using System;class Css
{
static void Main()
{
Console.WriteLine("1.加");
Console.WriteLine("2.减");
Console.WriteLine("3.乘");
Console.WriteLine("4.除"); int a,b,d;
Console.WriteLine("a");
a=Console.ReadLine();
Console.WriteLine("b");
b=Console.ReadLine();
string str;
str=Console.ReadLine(); switch(str)
{
case "1":
d=a+b;
Console.WriteLine("a+b={0}",d);
break;
case "2":
d=a-b;
Console.WriteLine("a-b={0}",d);
break;
case "3":
d=a*b;
Console.WriteLine("a*b={0}",d);
break;
case "4":
d=a/b;
Console.WriteLine("a/b={0}",d);
break;
default:
Console.WriteLine("1>a>4 error");
} }
}
{
static void Main()
{
Console.WriteLine("1.加");
Console.WriteLine("2.减");
Console.WriteLine("3.乘");
Console.WriteLine("4.除"); int a,b,d;
Console.WriteLine("a");
a=Console.ReadLine();
Console.WriteLine("b");
b=Console.ReadLine();
string str;
str=Console.ReadLine(); switch(str)
{
case "1":
d=a+b;
Console.WriteLine("a+b={0}",d);
break;
case "2":
d=a-b;
Console.WriteLine("a-b={0}",d);
break;
case "3":
d=a*b;
Console.WriteLine("a*b={0}",d);
break;
case "4":
d=a/b;
Console.WriteLine("a/b={0}",d);
break;
default:
Console.WriteLine("1>a>4 error");
} }
}
a=Console.ReadLine();
你这句能编译通过嘛....
using System;class Css
{
static void Main()
{
Console.WriteLine("1.加");
Console.WriteLine("2.减");
Console.WriteLine("3.乘");
Console.WriteLine("4.除"); int a,b,d;
Console.WriteLine("a");
a=int.Parse(Console.ReadLine());
Console.WriteLine("b");
b=int.Parse(Console.ReadLine());
string str;
str=Console.ReadLine(); switch(str)
{
case "1":
d=a+b;
Console.WriteLine("a+b={0}",d);
break;
case "2":
d=a-b;
Console.WriteLine("a-b={0}",d);
break;
case "3":
d=a*b;
Console.WriteLine("a*b={0}",d);
break;
case "4":
d=a/b;
Console.WriteLine("a/b={0}",d);
break;
default:
Console.WriteLine("1>a>4 error");
break; } }
}