代码

void my_memset(char *a, char c, unsigned n) {unsigned i = 0, m=n-100, v=(unsigned char)c*0x01010101;
        for(; i<m; i+=16) *(int*)(a)=*(int*)(a+4)=*(int*)(a+8)=*(int*)(a+12)=v;
	for(; i < n; i++)
		a[i] = c;
}

评测结果