char_arrays.c

   1 #include <stdio.h>
   2
   3 #define MAXLINE 1000
   4
   5 int getline(char line[], int maxline);
   6 void copy(char to[], char from[]);
   7
   8 main()
   9 {
  10   int len;                /* current line length */
  11   int max;                /* maximum length seen so far */
  12   char line[MAXLINE];     /* current input line */
  13   char longest[MAXLINE];  /* longest line saved here */
  14
  15   max = 0;
  16   while ((len = getline(line, MAXLINE)) > 0)
  17     if(len > max)
  18     {
  19       max = len;
  20       copy(longest, line);
  21     }
  22   if (max > 0)
  23     printf("%s", longest);
  24   return 0;
  25 }
  26
  27 /* getline: read a line into s, return length */
  28 int getline(char s[], int lim)
  29 {
  30   int c, i;
  31
  32   for (i = 0; i<lim-1 && (c = getchar()) != EOF && c!='\n'; ++i)
  33     s[i] = c;
  34   if(c == '\n')
  35   {
  36     s[i] = c;
  37     ++i;
  38   }
  39   s[i] = '\0';
  40   return i;
  41 }
  42
  43 /* copy: copy 'from' into 'to'; assume to is big enough */
  44 void copy(char to[], char from[])
  45 {
  46   int i;
  47   i = 0;
  48   while ((to[i] = from[i]) != '\0')
  49     ++i;
  50 }
  51