strstr example in C

Header file:

    string.h

Synopsis:

    char *strstr(char *str, char *substr);

Description:

   It returns pointer to the first occurrence of string substr in string str.  NULL is returned, if string substr is not available in string str.

strstr function C example:

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

  int main() {
        char *str, *res;
        str = (char *) malloc(100);

        printf("enter your string:");
        fgets(str, 80, stdin);

        res = strstr(str, "blogspot");  // checks blogspot is substring of str
        if (res == NULL)
                printf("Substring absent\n");
        else
                printf("Substring present: %s\n", res);
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/$ ./a.out
  enter your string:see-programming.blogspot.in
  Substring present: blogspot.in