#include <stdio.h>
#include <string.h>

char * compare_strings(char *,char *);

main()
{
      char *a="hello";
      char *b="world";
      char *longer;
      
      longer=compare_strings(a,b);
      printf("the longer string is :%s\n",longer);
      return 0;
}

char *compare_strings(char *first,char *second)
{
     int x,y;
     
     x=strlen(first);
     y=strlen(second);
     
     if(x>y)
       return (first);
     else
       return (second);
}