Strstr function : Finds first occurrence of sub-string in other string

Strstr function :  Finds first occurrence of sub-string in other string

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Features :

1. Finds the first occurrence of a sub string in another string
2. Main Purpose : Finding Substring
3. Header File : String.h
4. Checks whether s2 is present in s1 or not
5. On success, strstr returns a pointer to the element in s1 where s2 begins (points to s2 in s1).
6. On error (if s2 does not occur in s1), strstr returns null.
   

Syntax :

     char *strstr(const char *s1, const char *s2);

Live Example 1 : Parameters as String initialized using Pointers

#include<stdio.h>
#include<string.h>
int main(void)
{
   char *str1 = "c4learn.blogspot.com", *str2 = "spot", *ptr;
   ptr = strstr(str1, str2);
   printf("The substring is: %s\n", ptr);
   return 0;
}

Output  :

   The substring is: spot.com

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Live Example 2: Passing Direct Strings

#include<stdio.h>
#include<string.h>
void main()
{
   char *ptr;
   ptr = strstr("c4learn.blogspot.com","spot");
   printf("The substring is: %s\n", ptr);
}

Output  :

   The substring is: spot.com

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