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  1.  #include<stdio.h>
  2.  
  3.     #define MAXLINE 1000
  4.  
  5.     int max;
  6.     char line[MAXLINE];
  7.     char longest[MAXLINE];
  8.  
  9.     int getl(void);
  10.     void copy(void);
  11.  
  12.     int main()
  13.     {
  14.       int len;
  15.       extern  int max;
  16.       extern char longest[];
  17.  
  18.       max =0;
  19.       while((len =getl()) > 0)
  20.         if(len > max){
  21.           max = len;
  22.     	copy();
  23.         }
  24.  
  25.       if(max > 0)
  26.         printf("%s", longest);
  27.       return 0;
  28.     }
  29.  
  30.     int getl(void)
  31.     {
  32.       int c, i;
  33.       extern char line[];
  34.  
  35.       for(i =0; i < MAXLINE-1 &&
  36.     	(c=getchar()) != EOF && c != '\n'; ++i)
  37.         line[i] =c;
  38.  
  39.       if(c=='\n'){
  40.         line[i] = c;
  41.         ++i;
  42.       }
  43.       line[i] ='\0';
  44.       return i;
  45.     }
  46.  
  47.     void copy(void)
  48.     {
  49.       int i;
  50.       extern char line[], longest[];
  51.  
  52.       i=0;
  53.       while((longest[i] = line[i]) != '\0')
  54.         ++i;
  55.     }
  56.  
  57.  
Success #stdin #stdout 0.01s 1720KB
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stdout
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Standard output is empty
https://ideone.com/7k1Vw
language:
C99 (gcc 8.3)
created:
12 years ago
visibility:
public

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