strcmp, _mbscmp, wcscmp
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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
|
less than s2 |
< 0 |
|
the same as s2 |
== 0 |
|
greater than s2 |
> 0 |
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
| POSIX | Win32 | ANSI C | ANSI C++ | |
|---|---|---|---|---|
|
strcmp |
+ |
+ |
+ |
+ |
|
_mbscmp |
+ |
|||
|
wcscmp |
+ |
+ |
+ |