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  1. #include <stdio.h>
  2. char* my_strstr(char *a, char *b);
  3. int     main(void)
  4. {
  5.     char *haystack = "Stacy Lives Next Door Fool";
  6.     char *needle = "Stb";
  7.     char *ptr = NULL;
  8.     ptr = my_strstr(haystack, needle);
  9.     printf("%s\n", ptr);
  10.     return (0); 
  11.  }
  12.  
  13.  char* my_strstr(char *haystack, char *needle)
  14. {
  15.    int i;
  16. 	char *a = "does not exist";
  17.    if (!needle || !*needle)
  18.        return (haystack); // if s2 is empty
  19.    while (*haystack != '\0')
  20.    {
  21.     i = 0;
  22.     while (*haystack != *needle && *haystack != '\0')
  23.         haystack++;
  24.     while (haystack[i] == needle[i] && haystack[i] != '\0')
  25.         i++;
  26.     if (needle[i] == '\0')
  27.     {
  28.     	printf("\n In this loop\n");
  29.     	return (haystack);
  30.     }
  31.  
  32.     haystack++;
  33.    }
  34.     return a;
  35. }
Success #stdin #stdout 0s 2112KB
comments (?)
stdin 
Standard input is empty
stdout 
does not exist
https://ideone.com/c8RIYj
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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