Strstr() function takes two strings as arguments and searches the first string for an occurrence of the second string. - C String

Description

Strstr() function takes two strings as arguments and searches the first string for an occurrence of the second string.

Demo Code

#include <stdio.h> 
#include <string.h> 
int main()/*from www . j a v a 2 s.  c o m*/
{ 
   char *str1 = "this is a testing for xyz"; 
   char *str2 = "ing"; 
   char *str3 = "xyz"; 

   printf("\nstr1 = %s\n", str1); 
   printf("\nstr2 = %s\n", str2); 
   printf("\nstr3 = %s\n", str3);  

   if ( strstr(str1, str2) != NULL ) 
     printf("\nstr2 was found in str1\n"); 
   else 
     printf("\nstr2 was not found in str1\n"); 

   if ( strstr(str1, str3) != NULL ) 
     printf("\nstr3 was found in str1\n"); 
   else 
     printf("\nstr3 was not found in str1\n"); 
}

Result

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