main()
{int a=2,b=7,c=5;
switch(a>0)
{case 1:switch(b<0)
{case 1:printf(“@”); break;
case 2: printf(“!”); break;
}
case 0: switch(c==5)
{case 0: printf(“*”); break;
case 1: printf(“#”); break;
case 2: printf(“$”); break;
}
default : printf(“&”);
}
printf(“\n”);
}
答案是#& ,请说明