memstrtest.c

来自「klibc精简化的c程序库」· C语言 代码 · 共 29 行

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

int main(void)
{
	unsigned char t1[256], t2[256];
	int i;
	int r;

	for (i = 0; i < (int)sizeof(t1); i++)
		t1[i] = t2[i] = (unsigned char)i;

	r = memcmp(t1, t2, sizeof(t1));
	printf("memcmp r = %d\n", r);
	r = memcmp(t1, t2, sizeof(t1) / 2);
	printf("memcmp r = %d\n", r);
	t1[255] = 0;
	r = memcmp(t1, t2, sizeof(t1));
	printf("memcmp r = %d\n", r);

	for (i = 0; i < (int)sizeof(t1); i++)
		t1[i] = 0xaa;
	memset(t2, 0xaa, sizeof(t2));
	r = memcmp(t1, t2, sizeof(t1));
	printf("memcmp r = %d\n", r);
	return 0;
}