代码

#include <string.h>

void my_memset(char *a, char c, unsigned n)
{
	int x;
	memset(&x, c, 4);
	char *b = a, *e = a + (n & ~3);
	while (b != e)
		*(int *)b = x, b += 4;
	while (b != a + n)
		*b++ = c;
}

评测结果