.net（从控制台读入两个数，实现加减乘除）

[csharp] 
using system; 
using system.collections.generic; 
using system.linq; 
using system.text; 
 
namespace testclaclulate 
{ 
    class program 
    { 
        static void main(string[] args) 
        { 
            // 1，定义double变量 
            double numberone; 
            double numbertwo; 
 
            // 2，从控制台获得两个数 
            try 
            { 
                numberone = double.parse(console.readline()); 
                numbertwo = double.parse(console.readline()); 
 
                // 3，输出这两个数的加，减，乘，除 的结果 
                console.writeline(numberone + " + " + numbertwo + " = " + (numberone + numbertwo)); 
                console.writeline(numberone + " - " + numbertwo + " = " + (numberone - numbertwo)); 
                console.writeline(numberone + " * " + numbertwo + " = " + (numberone * numbertwo)); 
                console.writeline(numberone + " / " + numbertwo + " = " + (numberone / numbertwo)); 
            } 
            catch (system.formatexception e) 
            { 
                console.writeline(e.message); 
            } 
 
            // 
            console.readkey(); 
        } 
    } 
} 
作者：haifengzhilian