Header File 

string.h, mbstring.h 

Category 

Memory and String Manipulation Routines, Inline Routines 

Prototype 

int strcmp(const char *s1, const char *s2); 

int wcscmp(const wchar_t *s1, const wchar_t *s2); 

int _mbscmp(const unsigned char *s1, const unsigned char *s2); 

Description 

Compares one string to another. 

strcmp performs an unsigned comparison of s1 to s2, starting with the first character in each string and continuing with subsequent characters until the corresponding characters differ or until the end of the strings is reached. 

Return Value  

Example

#include <string.h>
#include <stdio.h>
int main(void)
{
char *buf1 = "aaa", *buf2 = "bbb", *buf3 = "ccc";
int ptr;
ptr = strcmp(buf2, buf1);
if (ptr > 0)
      printf("buffer 2 is greater than buffer 1\n");
   else
      printf("buffer 2 is less than buffer 1\n");
   ptr = strcmp(buf2, buf3);
   if (ptr > 0)
      printf("buffer 2 is greater than buffer 3\n");
   else
      printf("buffer 2 is less than buffer 3\n");
   return 0;
}

Portability