一道C语言坑爹题

请写出以下代码输出结果：

#include <stdio.h>

int main(){
    char c;
    unsigned char uc;
    unsigned short us;
    c = 128;
    uc = 128;
    us = c + uc;
    printf("0x%x\n", us);
    us = (unsigned char)c + uc;
    printf("0x%x\n", us);
    us = c + (char)uc;
    printf("0x%x\n", us);
    return