窗体四则运算。

我用的是窗体来做的 老师教过 比较简单的方法。



代码：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace szys.c

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private static int

Count = 0,

right = 0;

private void ys()

{

Random rn = new Random();

int i, j;

i = rn.Next(11);

j = rn.Next(1, 11);

textBox1.Text = i.ToString();

textBox2.Text = j.ToString();

textBox3.Text = "";

}

private void button1_Click_1(object sender, EventArgs e)

{

label1.Text = "+";

label1.Visible = true;

}

private void button2_Click_1(object sender, EventArgs e)

{

label1.Text = "-";

label1.Visible = true;

}

private void button3_Click(object sender, EventArgs e)

{

label1.Text = "*";

label1.Visible = true;

}

private void button4_Click(object sender, EventArgs e)

{

label1.Text = "/";

label1.Visible = true;

}

private void button5_Click_1(object sender, EventArgs e)

{

ys();

}

private void button6_Click_1(object sender, EventArgs e)

{

textBox3.Enabled = false;

MessageBox.Show("运算结束！");

}

private void textBox3_KeyDown_1(object sender, KeyEventArgs e)

{

if (label1.Text == "+")

{

int sum;

sum = int.Parse(textBox1.Text) + int.Parse(textBox2.Text);

if (e.KeyCode == Keys.Enter)

{

if (textBox3.Text == sum.ToString())

{ right++;

Count++;

}

else

Count++;

textBox4.Text = Count.ToString();

textBox4.Enabled = false;

textBox5.Text = right.ToString();

textBox5.Enabled = false;

ys();

}

}

else if (label1.Text=="-")

{ int cha;

cha = int.Parse(textBox1.Text) - int.Parse(textBox2.Text);

if (e.KeyCode == Keys.Enter)

{

if (textBox3.Text == cha.ToString())

{

right++;

Count++;

}

else

Count++;

textBox4.Text = Count.ToString();

textBox4.Enabled = false;

textBox5.Text = right.ToString();

textBox5.Enabled = false;

ys();

}

}

else if (label1.Text=="*")

{

int qj;

qj = int.Parse(textBox1.Text) * int.Parse(textBox2.Text);

if (e.KeyCode == Keys.Enter)

{

if (textBox3.Text == qj.ToString())

{

right++;

Count++;

}

else

Count++;

textBox4.Text = Count.ToString();

textBox4.Enabled = false;

textBox5.Text = right.ToString();

textBox5.Enabled = false;

ys();

}

}

if (label1.Text=="/")

{

double chu;

chu = int.Parse(textBox1.Text) /int.Parse(textBox2.Text);

if (e.KeyCode == Keys.Enter)

{

if (double.Parse (textBox3.Text)==chu )

{

right++;

Count++;

}

else

Count++;

textBox4.Text = Count.ToString();

textBox4.Enabled = false;

textBox5.Text = right.ToString();

textBox5.Enabled = false;

}

}

}

}

}

思路就是用窗体构建出模型，然后编写代码，用时1小时。