实例介绍
【实例简介】
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApp12
{
public partial class Form1 : Form
{
double num1, num2, reasult;//num1,num2用于保存操作数，reasult用于保存运算结果
bool decimalFlag = false;//decimaFlag判断是否为小数，默认为false（不是小数）
string myOperator;
public void but_ban2()
{
button1.Enabled = false;
button2.Enabled = false;
button3.Enabled = false;
button4.Enabled = false;
button5.Enabled = false;
button6.Enabled = false;
button7.Enabled = false;
button8.Enabled = false;
button9.Enabled = false;
button10.Enabled = false;
button11.Enabled = false;
}
public void but_enable2()
{
button1.Enabled = true;
button2.Enabled = true;
button3.Enabled = true;
button4.Enabled = true;
button5.Enabled = true;
button6.Enabled = true;
button7.Enabled = true;
button8.Enabled = true;
button9.Enabled = true;
button10.Enabled = true;
button11.Enabled = true;
}
public void but_ban()
{
button13.Enabled = false;
button14.Enabled = false;
button15.Enabled = false;
button16.Enabled = false;
button17.Enabled = false;
}
public void but_enable()
{
button13.Enabled = true;
button14.Enabled = true;
button15.Enabled = true;
button16.Enabled = true;
button17.Enabled = true;
}
public void NumClick(int myNumber)
{
if (decimalFlag)
{
textBox1.Text = textBox1.Text myNumber;
}
else
{
if(textBox1.Text == "0.")
textBox1.Text = myNumber ".";
else
textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 1) myNumber ".";
}
but_enable();
}
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
textBox1.Text = "0.";
textBox1.TextAlign = HorizontalAlignment.Right;
but_enable2();
but_ban();
}
private void button10_Click(object sender, EventArgs e)
{
NumClick(0);
}
private void button11_Click(object sender, EventArgs e)
{
decimalFlag = true;
}
private void button12_Click(object sender, EventArgs e)
{
num1 = 0;
num2 = 0;
decimalFlag = false;
textBox1.Text = "0.";
label1.Text = "运算过程：\n";
but_enable2();
but_ban();
}
private void button1_Click(object sender, EventArgs e)
{
NumClick(1);
}
private void button2_Click(object sender, EventArgs e)
{
NumClick(2);
}
private void button3_Click(object sender, EventArgs e)
{
NumClick(3);
}
private void button4_Click(object sender, EventArgs e)
{
NumClick(4);
}
private void button5_Click(object sender, EventArgs e)
{
NumClick(5);
}
private void button6_Click(object sender, EventArgs e)
{
NumClick(6);
}
private void button7_Click(object sender, EventArgs e)
{
NumClick(7);
}
private void button8_Click(object sender, EventArgs e)
{
NumClick(8);
}
private void button9_Click(object sender, EventArgs e)
{
NumClick(9);
}
private void button13_Click(object sender, EventArgs e)
{
myOperator = "add";
num1 = double.Parse(textBox1.Text);
textBox1.Text = "0.";
decimalFlag = false;
label1.Text = Convert.ToString(num1) " ";
but_ban();
but_enable2();
}
private void button14_Click(object sender, EventArgs e)
{
myOperator = "sub";
num1 = double.Parse(textBox1.Text);
textBox1.Text = "0.";
decimalFlag = false;
label1.Text = Convert.ToString(num1) "-";
but_ban();
but_enable2();
}
private void button15_Click(object sender, EventArgs e)
{
myOperator = "mul";
num1 = double.Parse(textBox1.Text);
textBox1.Text = "0.";
decimalFlag = false;
label1.Text = Convert.ToString(num1) "×";
but_ban();
but_enable2();
}
private void button16_Click(object sender, EventArgs e)
{
myOperator = "div";
num1 = double.Parse(textBox1.Text);
textBox1.Text = "0.";
decimalFlag = false;
label1.Text = Convert.ToString(num1) "÷";
but_ban();
but_enable2();
}
private void button17_Click(object sender, EventArgs e)
{
num2 = double.Parse(textBox1.Text);
switch(myOperator)
{
case "add":
reasult = num1 num2;
textBox1.Text = reasult.ToString();
break;
case "sub":
reasult = num1 - num2;
textBox1.Text = reasult.ToString();
break;
case "mul":
reasult = num1 * num2;
textBox1.Text = reasult.ToString();
break;
case "div":
if(num2 == 0)
{
textBox1.Text = "除数不能为“0”！";
}
else {
reasult = num1 / num2;
textBox1.Text = reasult.ToString();
}
break;
}
label1.Text = Convert.ToString(num2) "=" Convert.ToString(reasult) "\n";
but_ban2();
}
}
}
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