代码

void my_memset(char *a, char c, unsigned n) {
	register unsigned i = 0, flag = false;
	if (n > 8) {
		n -= 8;
		for (;i < n; i += 8) {
			a[i] = c;
			a[i + 1] = c;
			a[i + 2] = c;
			a[i + 3] = c; 
			a[i + 4] = c;
			a[i + 5] = c;
			a[i + 6] = c;
			a[i + 7] = c; 
		}
		n += 8;
	}
	while (i < n) a[i ++] = c;
}

评测结果