C#.net Flash's AS VB中关于变量数据直接交换的综合

C#与FLASH'AS差不多.它可以不借助中间变量,一句代码进行交换

using System;

namespace study
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 2, b = 5;
            //方法一
            b = a + (a = b) * 0;
            //方法二
            //b = a + (a = b) - a;
            //方法三
            //b = a + (a = b) - b;
            //方法四
            //a ^= b ^ (b ^= a ^ b);
            Console.WriteLine("{0},{1}", a ,b);
            Console.ReadLine();
        }
    }
}

VB中的方法

Sub a() '方法一
    Dim a%, b%
   
    a = -2: b = 5
    a = a Xor b: b = b Xor a: a = b Xor a
   
    MsgBox a & "   " & b
   
End Sub

Sub b() '方法二
    Dim a%, b%
   
    a = -2: b = 5
    a = a + b: b = a - b: a = a - b
   
    MsgBox a & "    " & b
   
End Sub

Sub c() '方法三
    Dim a%, b%
   
    a = -2: b = 5
    a = a * b: b = a / b: a = a / b
   
    MsgBox a & "    " & b
   
End Sub

Sub d() '方法四 借助中间变量
    Dim a%, b%, c%
   
    a = -2: b = 5
    c = a: a = b: b = c
   
    MsgBox a & "     " & b
   
End Sub