Syntax

#include <string.h>
char *strstr(const char *string1, const char *string2);

strstr finds the first occurrence of string2 in string1. The function ignores the null byte (\0) that ends string2 in the matching process.

strstr returns a pointer to the beginning of the first occurrence of string2 in string1. If string2 does not appear in string1, strstr returns NULL. If string2 points to a string with zero length, strstr returns string1.

This example locates the string haystack in the string "needle in a haystack".

#include <string.h>

int main(void)
{
   char *string1 = "needle in a haystack";
   char *string2 = "haystack";
   char *result;

   result = strstr(string1, string2);

   /* Result = a pointer to "haystack"                                        */

   printf("%s\n", result);
   return 0;

   /****************************************************************************
      The output should be:

      haystack
   ****************************************************************************/
}

• strchr
  
• strcspn
  
• strpbrk
  
• strrchr
  
• strspn
  
• wcschr
  
• wcscspn
  
• wcspbrk
  
• wcsrchr
  
• wcsspn
  
• wcswcs

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