PC^2/pc2team/samps/practice.java

   1 import java.io.*;
   2 import java.text.*;
   3
   4 //
   5 // File:    practice.java
   6 // Purpose: practice program, sigma positive integers
   7 // Author:  pc2@ecs.csus.edu or http://www.ecs.csus.edu/pc2
   8 //
   9 // Thu Jul 03 16:03:50 2003
  10 //
  11 // $Id: practice.java,v 1.1 2005/03/06 05:34:39 laned Exp $
  12 //
  13
  14 public class practice {
  15     public static void main(String[] args)
  16     {
  17         try
  18         {
  19                 RandomAccessFile file = new RandomAccessFile("practice.in", "r");
  20                 String line;
  21
  22                 int inval = 0;
  23                 int sum = 0;
  24
  25                 while((line = file.readLine()) != null)
  26                 {
  27                         inval = new Integer(line.trim()).intValue();
  28                         sum = 0;
  29
  30                         if (inval == 0)
  31                                 System.exit (4);
  32
  33                         if (inval < 1)
  34                         {
  35                                 for (int i = 1; i >= inval; i --)
  36                                        sum += i;
  37                         }
  38                         else
  39                         {
  40                                 for (int i = 1; i <= inval; i ++)
  41                                        sum += i;
  42                         }
  43                         System.out.println("N = "+inval+"  Sum = "+sum);
  44                 }
  45
  46                 System.out.println("Did not find trailing zero");
  47         }
  48         catch(Exception e)
  49         {
  50                 System.out.println("Possible trouble reading practice.in");
  51         }
  52     }
  53 }
  54
  55 // eof practice.java $Id: practice.java,v 1.1 2005/03/06 05:34:39 laned Exp $