const char * strstr ( const char * str1, const char * str2 );
      char * strstr (       char * str1, const char * str2 );

<cstring>

Locate substring

Returns a pointer to the first occurrence of str2 in str1, or a null pointer if there str2 is not part of str1.

The matching process does not include the terminating null-characters.

Parameters

str1

C string to be scanned.

str2

C string containing the sequence of characters to match.

Return Value

Portability

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

instead of the two overloaded versions provided in C++.

Example

/* strstr example */
#include <stdio.h>
#include <string.h>

int main ()
{
  char str[] ="This is a simple string";
  char * pch;
  pch = strstr (str,"simple");
  strncpy (pch,"sample",5);
  puts (str);
  return 0;
}

Output:

This is a sample string

See also