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 WinAppTest04
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //right 

        private void button1_Click(object sender, EventArgs e)
        {
            lblInfo.Text = "";
            button1.Enabled = false;
            radError.Enabled = radRight.Enabled = true;
            Random rn = new Random();
            int a, b,c;
            a = rn.Next(1, 100);
            b=rn.Next(1, 100);
            txtA.Text = a.ToString();
            txtB.Text = b.ToString();
            switch (rn.Next(0, 3))
            {
                case 0: c = a + b; txtC.Text = c.ToString(); break;
                case 1: c = a + b + rn.Next(1, 10); txtC.Text = c.ToString(); break;
                case 2: c = a + b - rn.Next(1, 10); txtC.Text = c.ToString(); break;
            }
            /* 
            if (rn.Next(0, 2) == 0)
            {
                c = a + b;
                txtC.Text = c.ToString();
            }
            else
            {
                c=a + b + rn.Next(1, 10);
                txtC.Text = c.ToString();
            }*/
        }

        private void radRight_CheckedChanged(object sender, EventArgs e)
        {
        }

        private void radError_CheckedChanged(object sender, EventArgs e)
        {
        }

        private void radRight_Click(object sender, EventArgs e)
        {
            if (radRight.Checked)
                if ((int.Parse(txtA.Text) + int.Parse(txtB.Text)) == int.Parse(txtC.Text))
                    lblInfo.Text = "判断正确！";
                else
                    lblInfo.Text = "判断错误！";
            button1.Enabled = true;
            radError.Enabled = radRight.Enabled = false; ;
        }

        private void radError_Click(object sender, EventArgs e)
        {
            if (radError.Checked)
                if (int.Parse(txtA.Text) + int.Parse(txtB.Text) != int.Parse(txtC.Text))
                    lblInfo.Text = "判断正确！";
                else
                    lblInfo.Text = "判断错误！";
            button1.Enabled = true;
            radError.Enabled = radRight.Enabled = false; ;
        }
    }
}