编辑代码

#include<stdio.h>
int main()
{
unsigned char x=255,y='\1';
switch(!!x) {
    case 0: printf("*0*#");break;
    case 1:
    switch(y)    {
        case 0: printf("*1*#");break;
        case 1: printf("*2*#");break;
    }
    default: printf("*3*#");
}
return 0;
}