Compare a specified number of characters.

This function is compatible with the following targets:

ANSI

BeOS

EMB/RTOS

Mac OS

Palm OS

Win32

#include <string.h>

int strncmp(const char *s1, 

Parameters for this facility are:

s1	const char *	The string to compare
s2	const char *	The comparison string
n	size_t	The maximum number of characters to compare

The strncmp() function compares n characters of the character array pointed to by s1 to n characters of the character array pointed to by s2. Neither s1 nor s2 needs to be null terminated character arrays.

The function stops prematurely if it reaches a null character before n characters have been compared.

strncmp() returns a zero if the first n characters of s1 and s2 are equal, a negative value if s1 is less than s2, and a positive value if s1 is greater than s2.

"memcmp"

"strcmp"

#include <string.h>
#include <stdio.h>

int main(void)
{
	static char s1[] = "12345anchor", s2[] = "12345zebra";

	if (strncmp(s1, s2, 5) == 0)
		printf("%s is equal to %s\n", s1, s2);
	else
		printf("%s is not equal to %s\n", s1, s2);

	return 0;
}
Output:
12345anchor is equal to 12345zebra





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Last updated: August 16, 2000