Header File 

string.h  

Category 

Memory and String Manipulation Routines, Inline Routines, C++ Prototyped Routines 

Prototype 

char *strchr(const char *s, int c);/* C only */ 

const char *strchr(const char *s, int c);// C++ only 

char *strchr( char *s, int c);// C++ only 

wchar_t *wcschr(const wchar_t *s, int c); 

unsigned char * _mbschr(const unsigned char *s, unsigned int c); 

Description 

Scans a string for the first occurrence of a given character. 

strchr scans a string in the forward direction, looking for a specific character. strchr finds the first occurrence of the character c in the string s. The null-terminator is considered to be part of the string. 

For example: 

strchr(strs,0) 

returns a pointer to the terminating null character of the string strs. 

Return Value 

strchr returns a pointer to the first occurrence of the character c in s; if c does not occur in s, strchr returns null. 

Example  

#include <string.h>
#include <stdio.h>
int main(void)
{
   char string[15];
   char *ptr, c = 'r';
   strcpy(string, "This is a string");
   ptr = strchr(string, c);
   if (ptr)
      printf("The character %c is at position: %d\n", c, ptr-string);
   else
      printf("The character was not found\n");
   return 0;
}

Portability