form1.cs

Visual C#2005程序设计教程

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WinApp6_3形参Swap
{
    public partial class Form1 : Form
    {
        int x = 15, y = 18;
        public Form1()
        {
            InitializeComponent();
        }

        public void Swap(int a, int b)
        {
            int c = a; a = b; b = c;   // 交换形参a、b的值
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Swap(x, y);
            label1.Text = "调用方法，传递参数之后两个变量的值：";
            txtA.Text = x.ToString();
            txtB.Text = y.ToString();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            txtA.Text = x.ToString();
            txtB.Text = y.ToString();
        }
    }
}