//switch case
int i=int.Parse(Console.ReadLine());
switch(i)
{
case 1:
console.WriteLine("星期一");
break;
case 2:
console.WriteLine("星期二");
break;
case 3:
console.WriteLine("星期三");
break;
case 4:
console.WriteLine("星期四");
break;
case 5:
console.WriteLine("星期五");
break;
default:
console.WriteLine("你输入的可能不正确");
break;