static void Main(string[] args)
{
string ="";
Console.WriteLine("请输入A,B,C,D,E,退出请输入:quit");
while((=Console.ReadLine())!="quit")
{
switch()
{
case "A":
case "a":
Console.WriteLine("90-100");
break;
case "B":
case "b":
Console.WriteLine("80-89");
break;
case "C":
case "c":
Console.WriteLine("70-79");
break;
case "D":
case "d":
Console.WriteLine("60-69");
break;
case "E":
case "e":
Console.WriteLine("0-59");
break;
default:
Console.WriteLine("请输入A,B,C,D,E,退出请输入:quit");
break;
}
}
{
string ="";
Console.WriteLine("请输入A,B,C,D,E,退出请输入:quit");
while((=Console.ReadLine())!="quit")
{
switch()
{
case "A":
case "a":
Console.WriteLine("90-100");
break;
case "B":
case "b":
Console.WriteLine("80-89");
break;
case "C":
case "c":
Console.WriteLine("70-79");
break;
case "D":
case "d":
Console.WriteLine("60-69");
break;
case "E":
case "e":
Console.WriteLine("0-59");
break;
default:
Console.WriteLine("请输入A,B,C,D,E,退出请输入:quit");
break;
}
}
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{
string ="";
Console.WriteLine("请输入A,B,C,D,E,退出请输入:quit");
while((=Console.ReadLine())!="quit")
{
switch()
{
case "A":
case "a":
Console.WriteLine("90-100");
break;
case "B":
case "b":
Console.WriteLine("80-89");
break;
case "C":
case "c":
Console.WriteLine("70-79");
break;
case "D":
case "d":
Console.WriteLine("60-69");
break;
case "E":
case "e":
Console.WriteLine("0-59");
break;
default:
Console.WriteLine("请输入A,B,C,D,E,退出请输入:quit");
break;
}
}
}