From 2757248632062f90d7cf88c1eaff131a3206ab7a Mon Sep 17 00:00:00 2001
From: lakshmanan <lucky.developer@gmail.com>
Date: Sun, 11 Apr 2010 21:43:01 +0530
Subject: [PATCH] move to repo.or.cz

---
 ch1/examples/example1.c |  23 +++++++++++++++++++++++
 ch1/examples/example2.c |  17 +++++++++++++++++
 ch1/examples/example3.c |  15 +++++++++++++++
 ch1/examples/example4.c |  12 ++++++++++++
 ch1/exercises/ex1.c     |  19 +++++++++++++++++++
 ch1/exercises/ex10.c    |  31 +++++++++++++++++++++++++++++++
 ch1/exercises/ex11.c    |  25 +++++++++++++++++++++++++
 ch1/exercises/ex12.c    |  16 ++++++++++++++++
 ch1/exercises/ex13.c    |  15 +++++++++++++++
 ch1/exercises/ex13.c~   |  15 +++++++++++++++
 ch1/exercises/ex2.c     |  23 +++++++++++++++++++++++
 ch1/exercises/ex3.c     |  18 ++++++++++++++++++
 ch1/exercises/ex4.c     |  15 +++++++++++++++
 ch1/exercises/ex5.c     |  26 ++++++++++++++++++++++++++
 ch1/exercises/ex6.c     |  20 ++++++++++++++++++++
 ch1/exercises/ex7.c     |  36 ++++++++++++++++++++++++++++++++++++
 ch1/exercises/ex8.c     |  32 ++++++++++++++++++++++++++++++++
 ch1/exercises/ex9.c     |  24 ++++++++++++++++++++++++
 ch2/examples/example1.c |  15 +++++++++++++++
 ch2/examples/example2.c |  24 ++++++++++++++++++++++++
 ch2/examples/example3.c |  22 ++++++++++++++++++++++
 ch2/examples/example4.c |  24 ++++++++++++++++++++++++
 ch2/examples/example5.c |  30 ++++++++++++++++++++++++++++++
 ch2/examples/example6.c |  18 ++++++++++++++++++
 ch2/examples/rough.c    |  10 ++++++++++
 ch2/exercises1/a.out    | Bin 0 -> 6692 bytes
 ch2/exercises1/ex1.c    |  28 ++++++++++++++++++++++++++++
 ch2/exercises1/ex10.c   |  30 ++++++++++++++++++++++++++++++
 ch2/exercises1/ex12.c   |  17 +++++++++++++++++
 ch2/exercises1/ex3.c    |  17 +++++++++++++++++
 ch2/exercises1/ex4.c    |  35 +++++++++++++++++++++++++++++++++++
 ch2/exercises1/ex5.c    |  41 +++++++++++++++++++++++++++++++++++++++++
 ch2/exercises1/ex6.c    |  21 +++++++++++++++++++++
 ch2/exercises1/ex7.c    |  20 ++++++++++++++++++++
 ch2/exercises1/ex8.c    |  15 +++++++++++++++
 ch2/exercises1/ex9.c    |  23 +++++++++++++++++++++++
 ch2/exercises1/exa2.c   |  16 ++++++++++++++++
 ch2/exercises1/exe11.c  |  35 +++++++++++++++++++++++++++++++++++
 ch2/exercises2/a.out    | Bin 0 -> 6787 bytes
 ch2/exercises2/ex1.c    |  14 ++++++++++++++
 ch2/exercises2/ex2.c    |  22 ++++++++++++++++++++++
 ch2/exercises2/ex3.c    |  27 +++++++++++++++++++++++++++
 ch2/exercises2/ex4.c    |  22 ++++++++++++++++++++++
 ch2/exercises2/ex5.c    |  39 +++++++++++++++++++++++++++++++++++++++
 ch2/exercises2/ex6.c    |  30 ++++++++++++++++++++++++++++++
 ch2/exercises2/ex7.c    |  24 ++++++++++++++++++++++++
 ch2/exercises2/ex8.c    |  21 +++++++++++++++++++++
 ch2/exercises3/a.out    | Bin 0 -> 6611 bytes
 ch2/exercises3/exA1.c   |  14 ++++++++++++++
 ch2/exercises3/exA2.c   |  15 +++++++++++++++
 ch2/exercises3/exB.c    |  12 ++++++++++++
 ch2/exercises3/exC.c    |  16 ++++++++++++++++
 ch3/examples/a.out      | Bin 0 -> 6420 bytes
 ch3/examples/exa1.c     |  20 ++++++++++++++++++++
 ch3/examples/exa10.c    |  10 ++++++++++
 ch3/examples/exa11.c    |  11 +++++++++++
 ch3/examples/exa12.c    |  18 ++++++++++++++++++
 ch3/examples/exa13.c    |  19 +++++++++++++++++++
 ch3/examples/exa14.c    |  27 +++++++++++++++++++++++++++
 ch3/examples/exa15.c    |  16 ++++++++++++++++
 ch3/examples/exa16.c    |  19 +++++++++++++++++++
 ch3/examples/exa2.c     |  14 ++++++++++++++
 ch3/examples/exa3.c     |  10 ++++++++++
 ch3/examples/exa4.c     |   9 +++++++++
 ch3/examples/exa5.c     |  16 ++++++++++++++++
 ch3/examples/exa6.c     |  10 ++++++++++
 ch3/examples/exa7.c     |  13 +++++++++++++
 ch3/examples/exa8.c     |  12 ++++++++++++
 ch3/examples/exa9.c     |  12 ++++++++++++
 ch3/exercises/a.out     | Bin 0 -> 6769 bytes
 ch3/exercises/ex1.c     |  30 ++++++++++++++++++++++++++++++
 ch3/exercises/ex2.c     |  24 ++++++++++++++++++++++++
 ch3/exercises/ex3.c     |  21 +++++++++++++++++++++
 ch3/exercises/ex4.c     |  15 +++++++++++++++
 ch3/exercises/ex5.c     |  35 +++++++++++++++++++++++++++++++++++
 75 files changed, 1440 insertions(+)
 create mode 100644 ch1/examples/example1.c
 create mode 100644 ch1/examples/example2.c
 create mode 100644 ch1/examples/example3.c
 create mode 100644 ch1/examples/example4.c
 create mode 100644 ch1/exercises/ex1.c
 create mode 100644 ch1/exercises/ex10.c
 create mode 100644 ch1/exercises/ex11.c
 create mode 100644 ch1/exercises/ex12.c
 create mode 100644 ch1/exercises/ex13.c
 create mode 100644 ch1/exercises/ex13.c~
 create mode 100644 ch1/exercises/ex2.c
 create mode 100644 ch1/exercises/ex3.c
 create mode 100644 ch1/exercises/ex4.c
 create mode 100644 ch1/exercises/ex5.c
 create mode 100644 ch1/exercises/ex6.c
 create mode 100644 ch1/exercises/ex7.c
 create mode 100644 ch1/exercises/ex8.c
 create mode 100644 ch1/exercises/ex9.c
 create mode 100644 ch2/examples/example1.c
 create mode 100644 ch2/examples/example2.c
 create mode 100644 ch2/examples/example3.c
 create mode 100644 ch2/examples/example4.c
 create mode 100644 ch2/examples/example5.c
 create mode 100644 ch2/examples/example6.c
 create mode 100644 ch2/examples/rough.c
 create mode 100755 ch2/exercises1/a.out
 create mode 100755 ch2/exercises1/ex1.c
 create mode 100755 ch2/exercises1/ex10.c
 create mode 100644 ch2/exercises1/ex12.c
 create mode 100755 ch2/exercises1/ex3.c
 create mode 100755 ch2/exercises1/ex4.c
 create mode 100755 ch2/exercises1/ex5.c
 create mode 100755 ch2/exercises1/ex6.c
 create mode 100755 ch2/exercises1/ex7.c
 create mode 100755 ch2/exercises1/ex8.c
 create mode 100755 ch2/exercises1/ex9.c
 create mode 100755 ch2/exercises1/exa2.c
 create mode 100644 ch2/exercises1/exe11.c
 create mode 100755 ch2/exercises2/a.out
 create mode 100644 ch2/exercises2/ex1.c
 create mode 100644 ch2/exercises2/ex2.c
 create mode 100644 ch2/exercises2/ex3.c
 create mode 100644 ch2/exercises2/ex4.c
 create mode 100644 ch2/exercises2/ex5.c
 create mode 100644 ch2/exercises2/ex6.c
 create mode 100644 ch2/exercises2/ex7.c
 create mode 100644 ch2/exercises2/ex8.c
 create mode 100755 ch2/exercises3/a.out
 create mode 100644 ch2/exercises3/exA1.c
 create mode 100644 ch2/exercises3/exA2.c
 create mode 100644 ch2/exercises3/exB.c
 create mode 100644 ch2/exercises3/exC.c
 create mode 100755 ch3/examples/a.out
 create mode 100644 ch3/examples/exa1.c
 create mode 100644 ch3/examples/exa10.c
 create mode 100644 ch3/examples/exa11.c
 create mode 100644 ch3/examples/exa12.c
 create mode 100644 ch3/examples/exa13.c
 create mode 100644 ch3/examples/exa14.c
 create mode 100644 ch3/examples/exa15.c
 create mode 100644 ch3/examples/exa16.c
 create mode 100644 ch3/examples/exa2.c
 create mode 100644 ch3/examples/exa3.c
 create mode 100644 ch3/examples/exa4.c
 create mode 100644 ch3/examples/exa5.c
 create mode 100644 ch3/examples/exa6.c
 create mode 100644 ch3/examples/exa7.c
 create mode 100644 ch3/examples/exa8.c
 create mode 100644 ch3/examples/exa9.c
 create mode 100755 ch3/exercises/a.out
 create mode 100644 ch3/exercises/ex1.c
 create mode 100644 ch3/exercises/ex2.c
 create mode 100644 ch3/exercises/ex3.c
 create mode 100644 ch3/exercises/ex4.c
 create mode 100644 ch3/exercises/ex5.c

diff --git a/ch1/examples/example1.c b/ch1/examples/example1.c
new file mode 100644
index 0000000..c8e2fc8
--- /dev/null
+++ b/ch1/examples/example1.c
@@ -0,0 +1,23 @@
+/*calculation of simple interest*/
+/*Author:lakshmanan*/
+
+#include<stdio.h>
+
+void main()
+{
+  int p=1000,n=3;
+  float r=n+5.5,si;
+  
+  /*p=1000;
+  n=3;
+  r=8.5;*/
+  
+    
+  printf("value of r=%f  n=%d",r,n);
+  
+  /*formula to find simple interest*/
+  si=p*n*r/100;
+  
+  printf("\n%f\n",si);
+}
+
diff --git a/ch1/examples/example2.c b/ch1/examples/example2.c
new file mode 100644
index 0000000..ac6be7f
--- /dev/null
+++ b/ch1/examples/example2.c
@@ -0,0 +1,17 @@
+/*calculation of simple interest 2 */
+/*using scanf */
+
+#include<stdio.h>
+
+void main()
+{
+  int p,n;
+  float si,r;
+  
+  printf("Enter the value of p,n,r: ");
+  scanf("%d %d %f",&p,&n,&r);
+  
+  si = p*n*r/100;
+  
+  printf("\n%f\n",si);
+}
diff --git a/ch1/examples/example3.c b/ch1/examples/example3.c
new file mode 100644
index 0000000..7767e8c
--- /dev/null
+++ b/ch1/examples/example3.c
@@ -0,0 +1,15 @@
+/*just for fun*/
+
+#include<stdio.h>
+
+void main()
+{
+  int num;
+  
+  printf("Enter a number: ");
+  scanf("%d",&num);
+  
+  printf("Now I am going to tell you a secret..\n");
+  printf("you just entered %d\n",num);
+  
+}
diff --git a/ch1/examples/example4.c b/ch1/examples/example4.c
new file mode 100644
index 0000000..1043358
--- /dev/null
+++ b/ch1/examples/example4.c
@@ -0,0 +1,12 @@
+/* performing a power function */
+
+#include<stdio.h>
+#include<math.h>
+
+void main()
+{
+	int a;
+	a=5%3;
+	printf("a is %d\n",a);
+	
+}
diff --git a/ch1/exercises/ex1.c b/ch1/exercises/ex1.c
new file mode 100644
index 0000000..075776a
--- /dev/null
+++ b/ch1/exercises/ex1.c
@@ -0,0 +1,19 @@
+/*ramesh sum*/
+
+#include<stdio.h>
+
+int main()
+{
+  float sal,da,hra;
+  float gross;
+  printf("Enter the basic salary: ");
+  scanf("%f",&sal);
+
+  da=0.40*sal;
+  hra=0.20*sal;
+
+  gross = sal+hra+da;
+
+  printf("The gross salary is %.2f\n",gross);
+  return 0;
+}
diff --git a/ch1/exercises/ex10.c b/ch1/exercises/ex10.c
new file mode 100644
index 0000000..5864caf
--- /dev/null
+++ b/ch1/exercises/ex10.c
@@ -0,0 +1,31 @@
+/*population problem*/
+
+#include<stdio.h>
+
+int main()
+{
+  long pop=80000,lit_pop,ilit_pop;
+  int lit_men,ilit_men,lit_women,ilit_women;
+  int men,women;
+
+  men = pop * 0.52;
+  women = pop - men;
+
+  lit_pop = 0.48 * pop;
+  ilit_pop = pop - lit_pop;
+
+  lit_men = 0.35*pop;
+  lit_women = lit_pop-(0.35*pop);
+
+  printf("Literate population: %d\n",lit_pop);
+  printf("Literate men:%d\n",lit_men);
+  printf("Literate women: %d\n",lit_women);
+
+  ilit_men = men - lit_men;
+  ilit_women = ilit_pop - ilit_men;
+
+  printf("Illeterate men : %d\n",ilit_men);
+  printf("Illeterate women: %d\n",ilit_women);
+
+  return 0;
+}
diff --git a/ch1/exercises/ex11.c b/ch1/exercises/ex11.c
new file mode 100644
index 0000000..febdab7
--- /dev/null
+++ b/ch1/exercises/ex11.c
@@ -0,0 +1,25 @@
+/*currency notes*/
+
+#include<stdio.h>
+
+int main()
+{
+  int amount;
+  int hun,fif,tens;
+  printf("Enter the amount to be withdrawn: ");
+  scanf("%d",&amount);
+
+  /*assume the amount is 4320*/
+
+  hun = (amount / 100)-1;
+  fif = 2;
+
+  amount = amount /10;
+  tens = amount%10;
+
+  printf("100s: %d\n",hun);
+  printf("50s: %d\n",fif);
+  printf("10s: %d\n",tens);
+
+  return 0;
+}
diff --git a/ch1/exercises/ex12.c b/ch1/exercises/ex12.c
new file mode 100644
index 0000000..5a0965f
--- /dev/null
+++ b/ch1/exercises/ex12.c
@@ -0,0 +1,16 @@
+/*profit and loss problem*/
+
+#include<stdio.h>
+
+int main()
+{
+  float sp,profit;
+  float cp;
+
+  printf("Enter the SP and profit: ");
+  scanf("%f %f",&sp,&profit);
+
+  cp = (sp - profit)/15;
+  printf("The cp of each item is %.2f\n",cp);
+  return 0;
+}
diff --git a/ch1/exercises/ex13.c b/ch1/exercises/ex13.c
new file mode 100644
index 0000000..82bf0f5
--- /dev/null
+++ b/ch1/exercises/ex13.c
@@ -0,0 +1,15 @@
+/*add 1 to each digit*/
+
+#include<stdio.h>
+
+int main()
+{
+  long num;
+  long num2;
+  printf("enter num: ");
+  scanf("%ld",&num);
+
+  num2 = num + 11111;
+  printf("Num2: %ld\n",num2);
+  return 0;
+}
diff --git a/ch1/exercises/ex13.c~ b/ch1/exercises/ex13.c~
new file mode 100644
index 0000000..82bf0f5
--- /dev/null
+++ b/ch1/exercises/ex13.c~
@@ -0,0 +1,15 @@
+/*add 1 to each digit*/
+
+#include<stdio.h>
+
+int main()
+{
+  long num;
+  long num2;
+  printf("enter num: ");
+  scanf("%ld",&num);
+
+  num2 = num + 11111;
+  printf("Num2: %ld\n",num2);
+  return 0;
+}
diff --git a/ch1/exercises/ex2.c b/ch1/exercises/ex2.c
new file mode 100644
index 0000000..3fa9f6c
--- /dev/null
+++ b/ch1/exercises/ex2.c
@@ -0,0 +1,23 @@
+/*distance problem*/
+
+#include<stdio.h>
+
+int main()
+{
+  float km;
+  float m,feet,inches,cm;
+
+  printf("Enter the distance in Km: ");
+  scanf("%f",&km);
+
+  m=km*1000;
+  feet = 3280.8399*km;
+  inches = km * 39370.0787;
+  cm = m *100;
+
+  printf("m=%.2f\n",m);
+  printf("feet=%.2f\n",feet);
+  printf("inches=%.2f\n",inches);
+  printf("cm=%.2f\n",cm);
+  return 0;
+}
diff --git a/ch1/exercises/ex3.c b/ch1/exercises/ex3.c
new file mode 100644
index 0000000..012d496
--- /dev/null
+++ b/ch1/exercises/ex3.c
@@ -0,0 +1,18 @@
+/*marks problem*/
+
+#include<stdio.h>
+
+int main()
+{
+  float s1,s2,s3,s4,s5;
+  float avg;
+
+  printf("Enter the marks: ");
+  scanf("%f %f %f %f %f",&s1,&s2,&s3,&s4,&s5);
+
+  avg = (s1+s2+s3+s4+s5)/5;
+
+  printf("The average is %.2f\n",avg);
+
+  return 0;
+}
diff --git a/ch1/exercises/ex4.c b/ch1/exercises/ex4.c
new file mode 100644
index 0000000..1da5e60
--- /dev/null
+++ b/ch1/exercises/ex4.c
@@ -0,0 +1,15 @@
+/*fahrenheit to celcius*/
+
+#include<stdio.h>
+
+int main()
+{
+  float fh,cs;
+  printf("Enter the temp in fahrenheit: ");
+  scanf("%f",&fh);
+
+  cs = (fh-32)*(5.0/9.0);
+
+  printf("The Temp in celcius is %.2f C",cs);
+  return 0;
+}
diff --git a/ch1/exercises/ex5.c b/ch1/exercises/ex5.c
new file mode 100644
index 0000000..8baaf82
--- /dev/null
+++ b/ch1/exercises/ex5.c
@@ -0,0 +1,26 @@
+/*area of circle and rectangle*/
+
+#include<stdio.h>
+
+int main()
+{
+  float len,bre,rad;
+  float area_rect,area_circle;
+  float perimeter,cir_circle;
+  printf("Enter the len and bre of rectangle: ");
+  scanf("%f %f",&len,&bre);
+  printf("Enter the radius of the circle: ");
+  scanf("%f",&rad);
+
+  area_rect = len*bre;
+  area_circle = 3.14*rad*rad;
+
+  perimeter = 2*(len+bre);
+  cir_circle = 2*3.14*rad;
+
+  printf("Area of Rectangle=%.2f perimeter=%.2f\n",area_rect,perimeter);
+  printf("Area of circle=%.2f cir_cirle=%.2f\n",area_circle,cir_circle);
+
+  return 0;
+
+}
diff --git a/ch1/exercises/ex6.c b/ch1/exercises/ex6.c
new file mode 100644
index 0000000..2bb4492
--- /dev/null
+++ b/ch1/exercises/ex6.c
@@ -0,0 +1,20 @@
+#include<stdio.h>
+
+int main()
+{
+  int c,d,temp;
+
+  printf("Enter C: ");
+  scanf("%d",&c);
+  printf("Enter D: ");
+  scanf("%d",&d);
+
+  temp = c;
+  c = d;
+  d = temp;
+
+  printf("Now C:%d D:%d\n",c,d);
+
+  return 0;
+
+}
diff --git a/ch1/exercises/ex7.c b/ch1/exercises/ex7.c
new file mode 100644
index 0000000..5940dd7
--- /dev/null
+++ b/ch1/exercises/ex7.c
@@ -0,0 +1,36 @@
+/*calculate the sum of digits in a 5 digit number*/
+
+#include<stdio.h>
+
+int main()
+{
+  long num;
+  int sum;
+  
+
+  printf("Enter the five digit number: ");
+  scanf("%ld",&num);
+
+  sum = 0;
+
+  sum = sum + (num%10);
+  num=num/10;
+
+  sum=sum+(num%10);
+  num = num/10;
+
+  sum=sum+(num%10);
+  num = num/10;
+
+  sum = sum+(num%10);
+  num = num/10;
+
+  sum = sum+(num%10);
+  num = num/10;
+
+  printf("The sum is %d\n",sum);
+  
+  return 0;
+
+
+}
diff --git a/ch1/exercises/ex8.c b/ch1/exercises/ex8.c
new file mode 100644
index 0000000..7350a05
--- /dev/null
+++ b/ch1/exercises/ex8.c
@@ -0,0 +1,32 @@
+/*reverse a 5-digit number*/
+
+#include<stdio.h>
+#include<math.h>
+
+int main()
+{
+  long num,num2;
+
+  printf("Enter num: ");
+  scanf("%ld",&num);
+
+  num2=0;
+
+  num2= num2 + (pow(10,4)*(num%10));
+  num= num/10;
+
+  num2 = num2 + (pow(10,3)*(num%10));
+  num = num/10;
+
+  num2 = num2 + (pow(10,2)*(num%10));
+  num = num/10;
+
+  num2 = num2 + (pow(10,1)*(num%10));
+  num = num/10;
+
+  num2 = num2 + (pow(10,0)*(num%10));
+  num  = num/10;
+
+  printf("Reverse is %ld\n",num2);
+  return 0;
+}
diff --git a/ch1/exercises/ex9.c b/ch1/exercises/ex9.c
new file mode 100644
index 0000000..61d9316
--- /dev/null
+++ b/ch1/exercises/ex9.c
@@ -0,0 +1,24 @@
+/*sum of first and last digit of a four digit number*/
+
+#include<stdio.h>
+
+int main()
+{
+  int num;
+  int sum;
+  printf("Enter the four digit number:");
+  scanf("%d",&num);
+
+  sum = 0;
+
+  sum = sum + (num%10);
+  num = num / 10;
+  num = num / 10;
+  num = num/10;
+  sum = sum+(num%10);
+
+  printf("The sum is %d\n",sum);
+
+
+  return 0;
+}
diff --git a/ch2/examples/example1.c b/ch2/examples/example1.c
new file mode 100644
index 0000000..0c240c7
--- /dev/null
+++ b/ch2/examples/example1.c
@@ -0,0 +1,15 @@
+#include<stdio.h>
+
+int main()
+{
+  int i;
+  printf("Enter a number less than 10: ");
+  scanf("%d",&i);
+
+  if(i<10)
+    printf("What an obedient servant you are !!\n");
+
+  return 0;
+}
+
+
diff --git a/ch2/examples/example2.c b/ch2/examples/example2.c
new file mode 100644
index 0000000..7904599
--- /dev/null
+++ b/ch2/examples/example2.c
@@ -0,0 +1,24 @@
+#include<stdio.h>
+
+/* calculation of total expenses*/
+
+
+int main(void)
+{
+	int qty;
+	float rate;
+	int dis;
+	float expense;
+	
+	printf("Enter quantity and rate per item: ");
+	scanf("%d %f",&qty,&rate);
+	
+	if(qty>1000)
+		dis = 10;
+	
+	expense = (rate*qty)-(0.10*rate*qty);
+	
+	printf("The total expense is %.2f\n",expense);
+	
+	return 0;
+}
diff --git a/ch2/examples/example3.c b/ch2/examples/example3.c
new file mode 100644
index 0000000..a1182b2
--- /dev/null
+++ b/ch2/examples/example3.c
@@ -0,0 +1,22 @@
+#include<stdio.h>
+
+int main()
+{
+  int hire_year,current_year;
+  float bonus;
+
+  printf("Enter the hire year: ");
+  scanf("%d",&hire_year);
+
+  printf("Enter the current year: ");
+  scanf("%d",&current_year);
+
+  if((current_year-hire_year)>3)
+  {
+	bonus=2500;
+	printf("Bonus is set to 2500/- \n");
+  }
+printf("bye\n");
+
+return 0;
+}
diff --git a/ch2/examples/example4.c b/ch2/examples/example4.c
new file mode 100644
index 0000000..ddea032
--- /dev/null
+++ b/ch2/examples/example4.c
@@ -0,0 +1,24 @@
+#include<stdio.h>
+
+int main()
+{
+
+	float basic,gross,hra,da;
+
+	printf("Enter the basic salary: ");
+	scanf("%f",&basic);
+
+	if(basic<1500)
+	{
+		hra=basic*10/100;
+		da=basic*90/100;
+	}
+	else
+	{
+		hra=500;
+		da=0.98*basic;
+	}
+	gross=basic+hra+da;
+	printf("The gross salary is %f\n",gross);
+	return 0;
+}
diff --git a/ch2/examples/example5.c b/ch2/examples/example5.c
new file mode 100644
index 0000000..14fbeb0
--- /dev/null
+++ b/ch2/examples/example5.c
@@ -0,0 +1,30 @@
+#include<stdio.h>
+
+int main()
+{
+	int s1,s2,s3,s4,s5;
+	float per;
+	printf("Enter the marks of all 5 subjects: ");
+	scanf("%d %d %d %d %d",&s1,&s2,&s3,&s4,&s5);
+	
+	per = (s1+s2+s3+s4+s5)/5;
+	if(per>=60)
+	{
+		printf("First Division\n");
+	}
+	else if(per>=50 && per<=59)
+	{
+		printf("Second Division\n");
+	} 
+	else if(per>=40 && per<=49)
+	{
+		printf("Third Division\n");
+	}
+	else if(per<40)
+	{
+		printf("Fail\n");
+	}
+
+
+	return 0;
+}
diff --git a/ch2/examples/example6.c b/ch2/examples/example6.c
new file mode 100644
index 0000000..8816e64
--- /dev/null
+++ b/ch2/examples/example6.c
@@ -0,0 +1,18 @@
+#include<stdio.h>
+
+int main()
+{
+
+  char sex,marital;
+  int age;
+
+  printf("Enter age, sex, marital: ");
+  scanf("%d %c %c",&age,&sex,&marital);
+
+  if((marital=='m')||(marital=='u' && sex=='m' && age>30)||(marital=='u' && sex=='f' && age>25))
+    printf("you are insured !\n");
+  else
+    printf("You are not married !\n");
+
+  return 0;
+}
diff --git a/ch2/examples/rough.c b/ch2/examples/rough.c
new file mode 100644
index 0000000..9ce570c
--- /dev/null
+++ b/ch2/examples/rough.c
@@ -0,0 +1,10 @@
+#include<stdio.h>
+
+int main()
+{
+  int i;
+  printf("Enter value of i less than 10: ");
+  scanf("%d",&i);
+  (i<10?printf("What an obedient student u are !\n"):printf("useless student\n"));
+  return 0;
+}
diff --git a/ch2/exercises1/a.out b/ch2/exercises1/a.out
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diff --git a/ch2/exercises1/ex1.c b/ch2/exercises1/ex1.c
new file mode 100755
index 0000000..f7000fa
--- /dev/null
+++ b/ch2/exercises1/ex1.c
@@ -0,0 +1,28 @@
+#include<stdio.h>
+
+/*profit and loss problem*/
+
+//int main()
+//{
+//	float cp,sp;
+//	printf("Enter the cost price of the Item: ");
+//	scanf("%f",&cp);
+//	printf("Enter the selling price of the Item: ");
+//	scanf("%f",&sp);
+//
+//	if(sp>cp)
+//	{
+//		printf("You have made a profit: ");
+//		printf("%.2f\n",(sp-cp));
+//	}
+//	else if(cp>sp)
+//	{
+//		printf("You have a loss of: ");
+//		printf("%.2f\n",(cp-sp));
+//	}
+//	else
+//		printf("You have neither made profit nor loss\n");
+//
+//
+//	return 0;
+//}
diff --git a/ch2/exercises1/ex10.c b/ch2/exercises1/ex10.c
new file mode 100755
index 0000000..2f4d0c9
--- /dev/null
+++ b/ch2/exercises1/ex10.c
@@ -0,0 +1,30 @@
+/* to check whether all the three points lie on a straight line */
+
+#include<stdio.h>
+
+int main()
+{
+	int x1,y1,x2,y2,x3,y3;
+	float area;
+	printf("Enter X1,Y1:");
+	scanf("%d %d",&x1,&y1);
+
+	printf("Enter X2,Y2:");
+	scanf("%d %d",&x2,&y2);
+
+	printf("Enter X3,Y3:");
+	scanf("%d %d",&x3,&y3);
+
+	/*compute the area formed by these three points. if
+	it is zero , then they all lie on a same line i.e they don form a triangle */
+	area = (1/2)*((x1*(y2-y3))+(x2*(y3-y1))+(x3*(y1-y2)));
+
+	if(area == 0)
+		printf("They lie on a straight line\n");
+	else
+		printf("They dont lie on a straight line\n");
+
+	printf("Press any key to exit\n");
+	getch();
+	return 0;
+}
diff --git a/ch2/exercises1/ex12.c b/ch2/exercises1/ex12.c
new file mode 100644
index 0000000..5804f85
--- /dev/null
+++ b/ch2/exercises1/ex12.c
@@ -0,0 +1,17 @@
+#include<stdio.h>
+
+int main()
+{
+ int x,y;
+ printf("Enter x and y:");
+ scanf("%d %d",&x,&y);
+
+ if(y==0)
+ 	printf("It lies on X Axis\n");
+ if(x==0)
+ 	printf("It lies on Y Axis\n");
+ if(x==0 && y==0)
+ 	printf("It is in origin\n");
+
+ return 0;
+}
diff --git a/ch2/exercises1/ex3.c b/ch2/exercises1/ex3.c
new file mode 100755
index 0000000..1cdac47
--- /dev/null
+++ b/ch2/exercises1/ex3.c
@@ -0,0 +1,17 @@
+/*leap year or not*/
+
+#include<stdio.h>
+
+//int main()
+//{
+//	int year;
+//	printf("Enter the year: ");
+//	scanf("%d",&year);
+//
+//	if(!(year%4))
+//		printf("The year %d is a leap year\n",year);
+//	else
+//		printf("It is not a leap year\n");
+//	return 0;
+//}
+
diff --git a/ch2/exercises1/ex4.c b/ch2/exercises1/ex4.c
new file mode 100755
index 0000000..86022ec
--- /dev/null
+++ b/ch2/exercises1/ex4.c
@@ -0,0 +1,35 @@
+#include<stdio.h>
+
+//int main()
+//{
+//	int day=2;
+//	int n;
+//	int year;
+//	
+//	printf("Enter the year: ");
+//	scanf("%d",&year);
+//	
+//	n = year - 2001;
+//	
+//	if(n>7)
+//		n = n-7;
+//	
+//	day += n;
+//
+//	if(day==1)
+//		printf("Sunday\n");
+//	if(day==2)
+//		printf("Monday\n");
+//	if(day==3)
+//		printf("Tuesday\n");
+//	if(day==4)
+//		printf("Wednesday\n");
+//	if(day==5)
+//		printf("Thursday\n");
+//	if(day==6)
+//		printf("Friday\n");
+//	if(day==7)
+//		printf("Saturday\n");
+//
+//	return 0;
+//}
diff --git a/ch2/exercises1/ex5.c b/ch2/exercises1/ex5.c
new file mode 100755
index 0000000..fa0898c
--- /dev/null
+++ b/ch2/exercises1/ex5.c
@@ -0,0 +1,41 @@
+/* reverse a five digit number and compare them for equality */
+
+#include<stdio.h>
+#include<math.h>
+
+//int main()
+//{
+//	long num,num_rev=0;
+//	int temp;
+//	printf("Enter the five digit number: ");
+//	scanf("%ld",&num);
+//
+//	/*reverse the number */
+//	
+//	temp = num%10;
+//	num_rev = num_rev + (temp*pow(10,4));
+//	num = num/10;
+//
+//	temp = num%10;
+//	num_rev = num_rev + (temp*pow(10,3));
+//	num = num/10;
+//
+//	temp = num%10;
+//	num_rev = num_rev + (temp*pow(10,2));
+//	num = num/10;
+//
+//	temp = num%10;
+//	num_rev = num_rev + (temp*pow(10,1));
+//	num = num/10;
+//
+//	temp= num%10;
+//	num_rev = num_rev + (temp*pow(10,0));
+//	printf("The reverse is %ld\n",num_rev);
+//	
+//	/*check for equality*/
+//	if(num==num_rev)
+//		printf("Both reverse and original are equal\n");
+//	else
+//		printf("Both are not equal\n");	
+//	return 0;
+//}
diff --git a/ch2/exercises1/ex6.c b/ch2/exercises1/ex6.c
new file mode 100755
index 0000000..bf85ec4
--- /dev/null
+++ b/ch2/exercises1/ex6.c
@@ -0,0 +1,21 @@
+#include<stdio.h>
+
+//int main()
+//{
+//	int ram,shyam,ajay;
+//	
+//	printf("Enter the ages of ram, shyam and ajay: ");
+//	scanf("%d %d %d",&ram,&shyam,&ajay);
+//
+//	if(ram<shyam && ram<ajay)
+//		printf("Ram is youngest\n");
+//	else if(shyam<ram && shyam<ajay)
+//		printf("Shyam is youngest\n");
+//	else if(ajay<ram && ajay<shyam)
+//		printf("Ajay is youngest\n");
+//
+//	printf("Press any key to exit\n");
+//	getch();
+//	return;
+//
+//}
\ No newline at end of file
diff --git a/ch2/exercises1/ex7.c b/ch2/exercises1/ex7.c
new file mode 100755
index 0000000..2f148a7
--- /dev/null
+++ b/ch2/exercises1/ex7.c
@@ -0,0 +1,20 @@
+/* program to check whether a give trianle is valid or not */
+
+//#include<stdio.h>
+//
+//int main()
+//{
+//	int a1,a2,a3;
+//
+//	printf("Enter the angles of the triangle: ");
+//	scanf("%d %d %d",&a1,&a2,&a3);
+//
+//	if((a1+a2+a3)==180)
+//		printf("The triangle is valid\n");
+//	else
+//		printf("The triangle is invalid\n");
+//
+//	printf("Press any key to exit\n");
+//	getch();
+//	return 0;
+//}
\ No newline at end of file
diff --git a/ch2/exercises1/ex8.c b/ch2/exercises1/ex8.c
new file mode 100755
index 0000000..581add8
--- /dev/null
+++ b/ch2/exercises1/ex8.c
@@ -0,0 +1,15 @@
+/*To find the absolute value of the given number */
+
+//#include<stdio.h>
+//#include<math.h>
+//int main()
+//{
+//	int i;
+//	printf("Enter a number: ");
+//	scanf("%d",&i);
+//	i = abs(i);
+//	printf("the absolute value is %d\n",i);
+//	printf("Pess any key to exit\n");
+//	getch();
+//	return 0;
+//}
diff --git a/ch2/exercises1/ex9.c b/ch2/exercises1/ex9.c
new file mode 100755
index 0000000..145850b
--- /dev/null
+++ b/ch2/exercises1/ex9.c
@@ -0,0 +1,23 @@
+/* area of a rectangle vs perimeter */
+
+//#include<stdio.h>
+//
+//int main()
+//{
+//	float len,bre,area,perim;
+//
+//	printf("Enter the length and breadth of the rectangle: ");
+//	scanf("%f %f",&len,&bre);
+//
+//	area = len * bre;
+//	perim = 2*(len + bre);
+//
+//	if(area > perim)
+//		printf("Area is greater than perimeter\n");
+//	else
+//		printf("Area is not greater than perimeter\n");
+//
+//	printf("Press any key to exit\n");
+//	getch();
+//	return 0;
+//}
\ No newline at end of file
diff --git a/ch2/exercises1/exa2.c b/ch2/exercises1/exa2.c
new file mode 100755
index 0000000..f6b7cb4
--- /dev/null
+++ b/ch2/exercises1/exa2.c
@@ -0,0 +1,16 @@
+/*Odd or even*/
+
+#include<stdio.h>
+
+int main()
+{
+	int i;
+	printf("Enter the Number: ");
+	scanf("%d",&i);
+
+	if(!(i%2))
+		printf("%d is even\n",i);
+	else
+		printf("%d is odd\n",i);
+	return 0;
+}
diff --git a/ch2/exercises1/exe11.c b/ch2/exercises1/exe11.c
new file mode 100644
index 0000000..4cf23c2
--- /dev/null
+++ b/ch2/exercises1/exe11.c
@@ -0,0 +1,35 @@
+/*To find whether a point lies on,inside or outside a circle */
+
+#include<stdio.h>
+#include<math.h>
+#include<stdlib.h>
+
+int main()
+{
+	int x1,y1,rad;
+	int x,y;
+	float d;
+	int temp;
+
+	printf("Enter the center of the circle X1, Y1 :");
+	scanf("%d %d",&x1,&y1);
+	printf("Enter the radius of the circle:");
+	scanf("%d",&rad);
+
+	printf("Enter the point (x,y):");
+	scanf("%d %d",&x,&y);
+
+	/*computing the distance between the two points*/
+	temp = pow(x1-x,2)+pow(y1-y,2);
+	d = sqrt(temp);
+
+
+	if(d==rad)
+		printf("The point (%d,%d) lies on the circle\n",x,y);
+	else if(d<rad)
+		printf("The point lies inside the circle\n");
+	else 
+		printf("The point lies outside the circle\n");
+	
+	return 0;
+}
diff --git a/ch2/exercises2/a.out b/ch2/exercises2/a.out
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diff --git a/ch2/exercises2/ex1.c b/ch2/exercises2/ex1.c
new file mode 100644
index 0000000..8b5ca9e
--- /dev/null
+++ b/ch2/exercises2/ex1.c
@@ -0,0 +1,14 @@
+#include<stdio.h>
+
+int main()
+{
+	int year;
+	printf("Enter the year: ");
+	scanf("%d",&year);
+
+	if((year%4==0)&&(year%100!=0)||(year%400==0))
+	{
+		printf("The year is a leap year\n");
+	}
+	return 0;
+}
diff --git a/ch2/exercises2/ex2.c b/ch2/exercises2/ex2.c
new file mode 100644
index 0000000..9abcf0b
--- /dev/null
+++ b/ch2/exercises2/ex2.c
@@ -0,0 +1,22 @@
+#include<stdio.h>
+
+int main()
+{
+	char ch;
+	
+	printf("Enter a character: ");
+	scanf("%c",&ch);
+
+	if(ch>=65 && ch<=90)
+		printf("It is a capital letter\n");
+	else if(ch>=97 && ch<=122)
+		printf("It is a small letter\n");
+	else if(ch>=48 && ch<=57)
+		printf("It is a number\n");
+	else if((ch>=0 && ch<=47)||(ch>=58 && ch<=64)||(ch>=91&&ch<=96)||(ch>=123 &&ch<=127))
+		printf("It is a special symbol\n");
+	else
+		printf("Enter a correct letter\n");
+	
+	return 0;
+}
diff --git a/ch2/exercises2/ex3.c b/ch2/exercises2/ex3.c
new file mode 100644
index 0000000..0f1f302
--- /dev/null
+++ b/ch2/exercises2/ex3.c
@@ -0,0 +1,27 @@
+#include<stdio.h>
+
+int main()
+{
+	int hard,tensile;
+	float carbon;
+	
+	printf("Enter hardness,carbon,Tensile strenght:");
+	scanf("%d %f %d",&hard,&carbon,&tensile);
+
+	if(hard>50 && carbon<0.7 && tensile>5600)
+		printf("Grade 10\n");
+	else if(hard>50 && carbon<0.7 && !tensile>5600)
+		printf("Grade 9\n");
+	else if(!hard>50 && carbon<0.7 && tensile>5600)
+		printf("Grade 8\n");
+	else if(hard>50 && !carbon<0.7 && tensile>5600)
+		printf("Grade 7\n");
+	else if((!hard>50 && !carbon<0.7 && tensile>5600)||(hard>50 && !carbon<0.7 && !tensile>5600)||(!hard>50 && carbon<0.7 && !tensile>5600))
+		printf("Grade 6\n");
+	else if(!hard>50 && !carbon<0.7 && !tensile>5600)
+		printf("Grade 5\n");
+	
+	printf("End\n");
+		
+	return 0;
+}
diff --git a/ch2/exercises2/ex4.c b/ch2/exercises2/ex4.c
new file mode 100644
index 0000000..188fa37
--- /dev/null
+++ b/ch2/exercises2/ex4.c
@@ -0,0 +1,22 @@
+/*library problem */
+
+#include<stdio.h>
+
+int main()
+{
+	int days;
+	printf("Enter the number of late days:");
+	scanf("%d",&days);
+
+	if(days<=5)
+		printf("Fine is 50ps.\n");
+	else if(days>=6 && days<=10)
+		printf("Fine is Rs.1\n");
+	else if(days<=10 && days<=30)
+		printf("Fine is Rs.5\n");
+	else if(days>30)
+		printf("YOUR MEMBERSHIP IS CANCELLED\n");
+	
+
+	return 0;
+}
diff --git a/ch2/exercises2/ex5.c b/ch2/exercises2/ex5.c
new file mode 100644
index 0000000..7c9a444
--- /dev/null
+++ b/ch2/exercises2/ex5.c
@@ -0,0 +1,39 @@
+#include<stdio.h>
+
+int main()
+{
+
+	float s1,s2,s3;
+	float big;
+	printf("Enter s1,s2,s3:");
+	scanf("%f %f %f",&s1,&s2,&s3);
+	big=s1;
+
+	if(s2>big && s2>s3)
+	{	big=s2;
+		if((s1+s3)>big)
+			printf("The triangle is valid\n");
+		else
+			printf("The Triangle is not valid\n");
+	}
+	else if(s3>big && s3>s2)
+	{	big=s3;
+		if((s1+s2)>big)
+			printf("The triangle is valid\n");
+		else
+			printf("The triangle is not valid\n");
+	}
+	else
+	{
+		if((s2+s3)>big)
+			printf("The triangle is valid\n");
+		else
+			printf("The triangle is not valid\n");
+	}
+
+
+	
+
+
+	return 0;
+}
diff --git a/ch2/exercises2/ex6.c b/ch2/exercises2/ex6.c
new file mode 100644
index 0000000..25a432d
--- /dev/null
+++ b/ch2/exercises2/ex6.c
@@ -0,0 +1,30 @@
+/*check for isoceles,equilateral,right triangle*/
+
+#include<stdio.h>
+#include<math.h>
+
+int main()
+{
+	float s1,s2,s3;
+	float temp1,temp2,temp3;
+	printf("Enter the three sides of triangle: ");
+	scanf("%f %f %f",&s1,&s2,&s3);
+
+	
+	/*checking equality*/
+	if(s1==s2 && s2==s3)
+		printf("This is an equilateral triangle.\n");
+	else if(s1==s2 || s2==s3 || s3==s1)
+		printf("This is an isoceles triangle.\n");
+	else 
+		printf("This is a scalene triangle\n");
+	
+
+	temp1 = sqrt(pow(s2,2)+pow(s3,2));
+	temp2 = sqrt(pow(s1,2)+pow(s3,2));
+	temp3 = sqrt(pow(s2,2)+pow(s1,2));
+	if(s1==temp1 || s2==temp2 || s3==temp3)
+		printf("It is an right triangle\n");
+
+	return 0;
+}
diff --git a/ch2/exercises2/ex7.c b/ch2/exercises2/ex7.c
new file mode 100644
index 0000000..93095c9
--- /dev/null
+++ b/ch2/exercises2/ex7.c
@@ -0,0 +1,24 @@
+/*worker efficiency problem*/
+
+#include<stdio.h>
+
+int main()
+{
+ 	float hours;
+
+	printf("Enter the time required by the worker:");
+	scanf("%f",&hours);
+
+	if(hours>2 && hours<=3)
+		printf("Woker is highly effecient\n");
+	else if(hours>3 && hours<=4)
+		printf("Worker is ordered \n");
+	else if(hours>4 && hours<=5)
+		printf("Worker is given training\n");
+	else if(hours > 5)
+		printf("Worker is fired\n");
+	else
+		printf("Worker must be awarded\n");
+	
+	return 0;
+}
diff --git a/ch2/exercises2/ex8.c b/ch2/exercises2/ex8.c
new file mode 100644
index 0000000..ce5642f
--- /dev/null
+++ b/ch2/exercises2/ex8.c
@@ -0,0 +1,21 @@
+/* Company policy*/
+
+#include<stdio.h>
+
+int main()
+{
+	int stock=500;
+	int qty; int credit;
+
+	printf("Enter quantity and Credit (0- Not Ok   1- Ok):");
+	scanf("%d %d",&qty,&credit);
+
+	if(qty<=stock && credit==1)
+		printf("Supplying Item\n");
+	else if(qty<=stock && credit==0)
+		printf("You have not credit\n");
+	else if(qty>stock && credit==1)
+		printf("You have our supplies, rest will be supplied in a week\n");
+	
+	return 0;
+}
diff --git a/ch2/exercises3/a.out b/ch2/exercises3/a.out
new file mode 100755
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literal 0
HcwPel00001

diff --git a/ch2/exercises3/exA1.c b/ch2/exercises3/exA1.c
new file mode 100644
index 0000000..de02aad
--- /dev/null
+++ b/ch2/exercises3/exA1.c
@@ -0,0 +1,14 @@
+
+
+#include<stdio.h>
+
+int main()
+{
+	char c;
+	printf("Enter a character:");
+	scanf("%c",&c);
+
+	(c>=97&&c<=122 ? printf("It is a small case letter\n"):printf("It is not a small letter\n"));
+
+	return 0;
+}
diff --git a/ch2/exercises3/exA2.c b/ch2/exercises3/exA2.c
new file mode 100644
index 0000000..717ff71
--- /dev/null
+++ b/ch2/exercises3/exA2.c
@@ -0,0 +1,15 @@
+#include<stdio.h>
+
+int main()
+{
+	char c;
+
+	printf("Enter a character:");
+	scanf("%c",&c);
+
+	((c>=0 && c<=47)||(c>=58 && c<=64)||(c>=91 && c<=96)||(c>=123 && c<=127)?
+		printf("It is a special symbol\n"):
+		printf("It is not a special symbol\n"));
+
+	return 0;
+}
diff --git a/ch2/exercises3/exB.c b/ch2/exercises3/exB.c
new file mode 100644
index 0000000..cdf9c73
--- /dev/null
+++ b/ch2/exercises3/exB.c
@@ -0,0 +1,12 @@
+#include<stdio.h>
+
+int main()
+{
+	int year;
+	printf("Enter a year:");
+	scanf("%d",&year);
+
+	(year%4==0 ? printf("This is a leap year\n"):printf("This is not a leap year\n"));
+
+	return 0;
+}
diff --git a/ch2/exercises3/exC.c b/ch2/exercises3/exC.c
new file mode 100644
index 0000000..493b205
--- /dev/null
+++ b/ch2/exercises3/exC.c
@@ -0,0 +1,16 @@
+/*greatest of three numbers*/
+
+#include<stdio.h>
+
+int main()
+{
+	int n1,n2,n3;
+	int max;
+	printf("Enter any three numbers:");
+	scanf("%d %d %d",&n1,&n2,&n3);
+
+	max=(n1>n2 && n1>n3 ?n1:(n2>n1 && n2>n3 ? n2 : n3));
+
+	printf("Maximum:%d\n",max);
+	return 0;
+}
diff --git a/ch3/examples/a.out b/ch3/examples/a.out
new file mode 100755
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Kh|srgChI@6q<}C0

literal 0
HcwPel00001

diff --git a/ch3/examples/exa1.c b/ch3/examples/exa1.c
new file mode 100644
index 0000000..6f371b7
--- /dev/null
+++ b/ch3/examples/exa1.c
@@ -0,0 +1,20 @@
+/*simple interest for 3 different persons*/
+
+#include<stdio.h>
+
+int main()
+{
+  int p,n,count;
+  float r,si;
+
+  count = 1;
+  while(count<=3)
+    {
+      printf("Enter p, n and r:");
+      scanf("%d %d %f",&p,&n,&r);
+      si=p*n*r/100;
+      printf("Simple Interest:Rs.%f\n",si);
+      count++;
+    }
+  return 0;
+}
diff --git a/ch3/examples/exa10.c b/ch3/examples/exa10.c
new file mode 100644
index 0000000..7741d7c
--- /dev/null
+++ b/ch3/examples/exa10.c
@@ -0,0 +1,10 @@
+#include<stdio.h>
+
+int main()
+{
+  int i;
+  for(i=0;i++<10;)
+    printf("%d\n",i);
+
+  return 0;
+}
diff --git a/ch3/examples/exa11.c b/ch3/examples/exa11.c
new file mode 100644
index 0000000..aa9040d
--- /dev/null
+++ b/ch3/examples/exa11.c
@@ -0,0 +1,11 @@
+#include<stdio.h>
+
+int main()
+{
+ 
+  int i;
+  for(i=0;++i<=10;)
+    printf("%d\n",i);
+
+  return 0;
+}
diff --git a/ch3/examples/exa12.c b/ch3/examples/exa12.c
new file mode 100644
index 0000000..66e1530
--- /dev/null
+++ b/ch3/examples/exa12.c
@@ -0,0 +1,18 @@
+#include<stdio.h>
+
+int main()
+{
+  int r,c,sum;
+
+  for(r=1;r<=3;r++)
+    {
+      for(c=1;c<=2;c++)
+	{
+	  sum= r+c;
+	  printf("r=%d c=%d sum=%d\n",r,c,sum);
+	}
+    }
+
+
+  return 0;
+}
diff --git a/ch3/examples/exa13.c b/ch3/examples/exa13.c
new file mode 100644
index 0000000..a1e8d98
--- /dev/null
+++ b/ch3/examples/exa13.c
@@ -0,0 +1,19 @@
+/*Execution of a loop an unknown number of times*/
+
+#include<stdio.h>
+
+int main()
+{
+  char another='y';
+  int num;
+  do{
+    printf("Enter a number:");
+    scanf("%d",&num);
+    printf("Square of %d is %d\n",num,num*num);
+    
+    printf("Want to enter another number Y/n:");
+    scanf("%c",&another);
+  }while(another=='y');
+
+  return 0;
+}
diff --git a/ch3/examples/exa14.c b/ch3/examples/exa14.c
new file mode 100644
index 0000000..c721724
--- /dev/null
+++ b/ch3/examples/exa14.c
@@ -0,0 +1,27 @@
+/*Break statements*/
+
+#include<stdio.h>
+
+int main()
+{
+  int num,i;
+  
+  i=2;
+
+  printf("Enter a number:");
+  scanf("%d",&num);
+
+  while( i<= num-1)
+    {
+      if(num%i == 0 )
+	{
+	  printf("Not a prime number\n");
+	  break;
+	}
+      i++;
+    }
+  if(i==num)
+    printf("This is a prime number");
+
+  return 0;
+}
diff --git a/ch3/examples/exa15.c b/ch3/examples/exa15.c
new file mode 100644
index 0000000..769052e
--- /dev/null
+++ b/ch3/examples/exa15.c
@@ -0,0 +1,16 @@
+#include<stdio.h>
+
+int main()
+{
+  int i=1,j=1;
+  while(i++<=100)
+    {
+      while(j++<=200)
+	{
+	  if(j==150)
+	    break;
+	  else 
+	    printf("%d %d\n",i,j);
+	}
+    }
+}
diff --git a/ch3/examples/exa16.c b/ch3/examples/exa16.c
new file mode 100644
index 0000000..c5f4562
--- /dev/null
+++ b/ch3/examples/exa16.c
@@ -0,0 +1,19 @@
+#include<stdio.h>
+
+int main()
+{
+
+  int i,j;
+  for(i=1;i<=2;i++)
+    {
+      for(j=1;j<=2;j++)
+	{
+	  if(i==j)
+	    continue;
+
+	  printf("%d %d\n",i,j);
+
+	}
+    }
+  return 0;
+}
diff --git a/ch3/examples/exa2.c b/ch3/examples/exa2.c
new file mode 100644
index 0000000..c7b358d
--- /dev/null
+++ b/ch3/examples/exa2.c
@@ -0,0 +1,14 @@
+/*while loop with decrementing counter*/
+
+#include<stdio.h>
+
+int main()
+{
+  int i=5;
+  while(i>=1)
+    {
+      printf("I:%d\n",i);
+      i--;
+    }
+  return 0;
+}
diff --git a/ch3/examples/exa3.c b/ch3/examples/exa3.c
new file mode 100644
index 0000000..c3882c4
--- /dev/null
+++ b/ch3/examples/exa3.c
@@ -0,0 +1,10 @@
+#include<stdio.h>
+
+int main()
+{
+  int i=0;
+  while(i++<10)
+    printf("%d\n",i);
+
+  return 0;
+}
diff --git a/ch3/examples/exa4.c b/ch3/examples/exa4.c
new file mode 100644
index 0000000..3080d2c
--- /dev/null
+++ b/ch3/examples/exa4.c
@@ -0,0 +1,9 @@
+#include<stdio.h>
+
+int main()
+{
+  int i=0;
+  while(++i<=10)
+    printf("i:%d\n",i);
+  return 0;
+}
diff --git a/ch3/examples/exa5.c b/ch3/examples/exa5.c
new file mode 100644
index 0000000..9e1a648
--- /dev/null
+++ b/ch3/examples/exa5.c
@@ -0,0 +1,16 @@
+#include<stdio.h>
+
+int main()
+{
+  int p,n,count;
+  float r,si;
+  for(count=1;count<=3;count++)
+    {
+      printf("Enter values of p,n and r: ");
+      scanf("%d %d %f",&p,&n,&r);
+
+      si=p*n*r/100;
+      printf("SI:%.2f\n",si);
+    }
+  return 0;
+}
diff --git a/ch3/examples/exa6.c b/ch3/examples/exa6.c
new file mode 100644
index 0000000..5024806
--- /dev/null
+++ b/ch3/examples/exa6.c
@@ -0,0 +1,10 @@
+#include<stdio.h>
+
+int main()
+{
+  int i;
+  for(i=1;i<=10;i++)
+    printf("%d\n",i);
+
+  return 0;
+}
diff --git a/ch3/examples/exa7.c b/ch3/examples/exa7.c
new file mode 100644
index 0000000..18ab4a7
--- /dev/null
+++ b/ch3/examples/exa7.c
@@ -0,0 +1,13 @@
+/*another way form of for loop to print the numbers*/
+
+#include<stdio.h>
+
+int main()
+{
+  int i=1;
+  for(;i<=10;i++)
+    {
+      printf("%d\n",i);
+    }
+  return 0;
+}
diff --git a/ch3/examples/exa8.c b/ch3/examples/exa8.c
new file mode 100644
index 0000000..9a8ab7a
--- /dev/null
+++ b/ch3/examples/exa8.c
@@ -0,0 +1,12 @@
+#include<stdio.h>
+
+int main()
+{
+  int i;
+  for(i=1;i<=10;)
+    {
+      printf("%d\n",i);
+      i++;
+    }
+  return 0;
+}
diff --git a/ch3/examples/exa9.c b/ch3/examples/exa9.c
new file mode 100644
index 0000000..f7e2dd9
--- /dev/null
+++ b/ch3/examples/exa9.c
@@ -0,0 +1,12 @@
+#include<stdio.h>
+
+int main()
+{
+  int i=1;
+  for(;i<=10;)
+    {
+      printf("%d\n",i);
+      i++;
+    }
+  return 0;
+}
diff --git a/ch3/exercises/a.out b/ch3/exercises/a.out
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diff --git a/ch3/exercises/ex1.c b/ch3/exercises/ex1.c
new file mode 100644
index 0000000..360b31c
--- /dev/null
+++ b/ch3/exercises/ex1.c
@@ -0,0 +1,30 @@
+#include<stdio.h>
+
+int main()
+{
+  int hours;
+  int i;
+  float pay;
+  i=1;
+
+  while(i<=10)
+    {
+      printf("Enter the number of hours: ");
+      scanf("%d",&hours);
+
+      if((hours-40)>0)
+	{
+	  printf("You get an overpay award\n");
+	  pay= (hours-40)*12;
+	  printf("The overtime award: %.2f\n",pay);
+	}
+      else
+	{
+	  printf("You dont get an overtime pay\n");
+	}
+
+      i++;
+    }
+  printf("Bye");
+  return 0;
+}
diff --git a/ch3/exercises/ex2.c b/ch3/exercises/ex2.c
new file mode 100644
index 0000000..fb9ee88
--- /dev/null
+++ b/ch3/exercises/ex2.c
@@ -0,0 +1,24 @@
+/*factorial of a given number*/
+
+
+#include<stdio.h>
+
+int main()
+{
+  int num;
+  int i;
+  long fact;
+  printf("Enter a number:");
+  scanf("%d",&num);
+
+  i=1;
+  fact = 1;
+  while(i<=num)
+    {
+      fact = fact*i;
+      i++;
+    }
+  printf("The factorial is %ld\n",fact);
+  printf("Bye\n");
+  return 0;
+}
diff --git a/ch3/exercises/ex3.c b/ch3/exercises/ex3.c
new file mode 100644
index 0000000..2a482e2
--- /dev/null
+++ b/ch3/exercises/ex3.c
@@ -0,0 +1,21 @@
+/*one number power another */
+
+#include<stdio.h>
+
+int main()
+{
+  int p,q;
+  long ans=1;
+  printf("Enter numbers p and q:");
+  scanf("%d %d",&p,&q);
+
+  while(q>0)
+    {
+
+      ans = ans * p;
+   
+      q--;
+    }
+  printf("The power of the number is %ld\n",ans);
+  return 0;
+}
diff --git a/ch3/exercises/ex4.c b/ch3/exercises/ex4.c
new file mode 100644
index 0000000..aba870f
--- /dev/null
+++ b/ch3/exercises/ex4.c
@@ -0,0 +1,15 @@
+/*print ascii values and their equivalent characters*/
+
+#include<stdio.h>
+
+int main()
+{
+  int ascii=0;
+
+  while(ascii<=255)
+    {
+      printf("ASCII=%d Character = %c\n",ascii,ascii);
+      ascii++;
+    }
+  return 0;
+}
diff --git a/ch3/exercises/ex5.c b/ch3/exercises/ex5.c
new file mode 100644
index 0000000..5f0df23
--- /dev/null
+++ b/ch3/exercises/ex5.c
@@ -0,0 +1,35 @@
+/*printf ascii numbers from 1 to 500*/
+
+#include<stdio.h>
+#include<math.h>
+int main()
+{
+  int i=1;
+
+  int temp;
+  int digit;
+  int sum;
+
+  while(i<=500)
+    {
+      temp=i;
+      sum=0;
+      
+      while(temp!=0)
+	{
+	  
+	  digit = temp%10;
+	  sum = sum + pow(digit,3);
+	  temp=temp/10;
+	}
+      
+      if(sum==i)
+	printf("%d is an armstrong number\n",i);
+      
+      /*printf("The sum is %d\n",sum);*/
+
+      i++;
+    }
+
+  return 0;
+}
-- 
2.11.4.GIT