最终效果图：
编辑器：Visual Studio 2022
具体步骤：
1、创建窗体应用
2、拖拽公共组件 label
并且 修改 字体
（name）labelout
font 宋体 常规 一号
Text 0
textalign BottomRight
autoSize false （可以任意拖拽大小 位置）
3、复制窗体1
（name）labelbefore
font 宋体 常规 二号
4、复制窗体2 最上面的
（name）labelmode
然后将 第一行 第二行 的 text 文本0 置空
5、拖拽公共组件button
（name）num1
text 1
然后复制 将对应的name text 改成对应的数字
6、双击数字 添加对应数字的点击事件（运行 保存完 双击才能加事件 ）
7、选中数字，点击工具箱中的公共组件 指针 复制 按钮
Text 改为 清除
name clean
双击清除 添加事件
number = 0;
label2.Text = Convert.ToString(number);
8、复制 清除按钮 添加 加减乘除，并且双击添加事件
plus ? ? ??????????????? +
minus ? ??????????????? -
multiplication ?????? *
division ???????? ?????? /
9、添加事件
double number = 0, number2 = 0;
int inputNumber;
enum Operator { none,plus,minus,multiplication,divsion }
Operator mode = Operator.none;
bool ismode = false;
public void calll(int an)
{
if (ismode == false) {
number = number * 10 + an;
label2.Text = Convert.ToString(number);
}
else
{
number2 = number2 * 10 + an;
label2.Text = Convert.ToString(number2);
}
}
inputNumber = 1;
calll(inputNumber);
10、添加 等于号 equal
text =
name equal
定义变量
添加事件
源代码：
namespace call
{
public partial class labelout : Form
{
double number = 0, number2 = 0, result;
int inputNumber;
enum Operator { none,plus,minus,multiplication,divsion }
Operator mode = Operator.none;
bool isequal = false;
public labelout()
{
InitializeComponent();
}
private void num1_Click(object sender, EventArgs e)
{
inputNumber = 1;
calll(inputNumber);
}
private void num2_Click(object sender, EventArgs e)
{
inputNumber = 2;
calll(inputNumber);
}
private void num3_Click(object sender, EventArgs e)
{
inputNumber = 3;
calll(inputNumber);
}
private void num4_Click(object sender, EventArgs e)
{
inputNumber = 4;
calll(inputNumber);
}
private void num5_Click(object sender, EventArgs e)
{
inputNumber = 5;
calll(inputNumber);
}
private void num6_Click(object sender, EventArgs e)
{
inputNumber = 6;
calll(inputNumber);
}
private void num7_Click(object sender, EventArgs e)
{
inputNumber = 7;
calll(inputNumber);
}
private void num8_Click(object sender, EventArgs e)
{
inputNumber = 8;
calll(inputNumber);
}
private void num9_Click(object sender, EventArgs e)
{
inputNumber = 9;
calll(inputNumber);
}
private void num0_Click(object sender, EventArgs e)
{
inputNumber = 0;
calll(inputNumber);
}
private void clean_Click(object sender, EventArgs e)
{
//清除
//第一次代码
//number = 0;
//label2.Text = Convert.ToString(number);
//第二次代码
cleanall();
}
private void minus_Click(object sender, EventArgs e)
{
// -
mode = Operator.minus;
switchmode();
}
private void plus_Click(object sender, EventArgs e)
{
// +
mode = Operator.plus;
switchmode();
}
private void multiplication_Click(object sender, EventArgs e)
{
// *
mode = Operator.multiplication;
switchmode();
}
private void equal_Click(object sender, EventArgs e)
{
//等于
switch (mode)
{
case Operator.plus:
result = number + number2;
break;
case Operator.minus:
result = number - number2;
break;
case Operator.multiplication:
result = number * number2;
break;
case Operator.divsion:
result = number / number2;
break;
}
number = 0;
number2= 0;
isequal = true;
labelbefore.Text = "";
labelmode.Text = "";
label2.Text = Convert.ToString(result);
}
private void division_Click(object sender, EventArgs e)
{
// /
mode = Operator.divsion;
switchmode();
}
//清空
public void cleanall()
{
number = 0;
number2 = 0;
label2.Text = Convert.ToString(number);
labelbefore.Text = "";
labelmode.Text = "";
isequal = false;
mode = Operator.none;
}
//
public void switchmode()
{
switch (mode)
{
case Operator.plus:
labelmode.Text = "+";
break;
case Operator.minus:
labelmode.Text = "-";
break;
case Operator.multiplication:
labelmode.Text = "*";
break;
case Operator.divsion:
labelmode.Text = "/";
break;
}
if (isequal == true)
{
number = result;
}
labelbefore.Text = Convert.ToString(number);
label2.Text = Convert.ToString(number2);
}
}
}
namespace call
{
partial class labelout
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.labelbefore = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.labelmode = new System.Windows.Forms.Label();
this.num1 = new System.Windows.Forms.Button();
this.num2 = new System.Windows.Forms.Button();
this.num6 = new System.Windows.Forms.Button();
this.num5 = new System.Windows.Forms.Button();
this.num4 = new System.Windows.Forms.Button();
this.num3 = new System.Windows.Forms.Button();
this.num7 = new System.Windows.Forms.Button();
this.num9 = new System.Windows.Forms.Button();
this.num8 = new System.Windows.Forms.Button();
this.num0 = new System.Windows.Forms.Button();
this.clean = new System.Windows.Forms.Button();
this.minus = new System.Windows.Forms.Button();
this.multiplication = new System.Windows.Forms.Button();
this.division = new System.Windows.Forms.Button();
this.plus = new System.Windows.Forms.Button();
this.equal = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// labelbefore
//
this.labelbefore.Font = new System.Drawing.Font("宋体", 22.2F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
this.labelbefore.Location = new System.Drawing.Point(36, 78);
this.labelbefore.Margin = new System.Windows.Forms.Padding(7, 0, 7, 0);
this.labelbefore.Name = "labelbefore";
this.labelbefore.Size = new System.Drawing.Size(1004, 57);
this.labelbefore.TabIndex = 0;
this.labelbefore.TextAlign = System.Drawing.ContentAlignment.BottomRight;
//
// label2
//
this.label2.Location = new System.Drawing.Point(36, 169);
this.label2.Margin = new System.Windows.Forms.Padding(7, 0, 7, 0);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(1004, 99);
this.label2.TabIndex = 1;
this.label2.Text = "0";
this.label2.TextAlign = System.Drawing.ContentAlignment.BottomRight;
//
// labelmode
//
this.labelmode.Font = new System.Drawing.Font("宋体", 22.2F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
this.labelmode.Location = new System.Drawing.Point(36, 135);
this.labelmode.Margin = new System.Windows.Forms.Padding(7, 0, 7, 0);
this.labelmode.Name = "labelmode";
this.labelmode.Size = new System.Drawing.Size(1004, 51);
this.labelmode.TabIndex = 2;
this.labelmode.TextAlign = System.Drawing.ContentAlignment.BottomRight;
//
// num1
//
this.num1.Location = new System.Drawing.Point(62, 289);
this.num1.Name = "num1";
this.num1.Size = new System.Drawing.Size(175, 59);
this.num1.TabIndex = 3;
this.num1.Text = "1";
this.num1.UseVisualStyleBackColor = true;
this.num1.Click += new System.EventHandler(this.num1_Click);
//
// num2
//
this.num2.Location = new System.Drawing.Point(256, 289);
this.num2.Name = "num2";
this.num2.Size = new System.Drawing.Size(175, 59);
this.num2.TabIndex = 4;
this.num2.Text = "2";
this.num2.UseVisualStyleBackColor = true;
this.num2.Click += new System.EventHandler(this.num2_Click);
//
// num6
//
this.num6.Location = new System.Drawing.Point(449, 395);
this.num6.Name = "num6";
this.num6.Size = new System.Drawing.Size(175, 59);
this.num6.TabIndex = 5;
this.num6.Text = "6";
this.num6.UseVisualStyleBackColor = true;
this.num6.Click += new System.EventHandler(this.num6_Click);
//
// num5
//
this.num5.Location = new System.Drawing.Point(256, 395);
this.num5.Name = "num5";
this.num5.Size = new System.Drawing.Size(175, 59);
this.num5.TabIndex = 6;
this.num5.Text = "5";
this.num5.UseVisualStyleBackColor = true;
this.num5.Click += new System.EventHandler(this.num5_Click);
//
// num4
//
this.num4.Location = new System.Drawing.Point(62, 395);
this.num4.Name = "num4";
this.num4.Size = new System.Drawing.Size(175, 59);
this.num4.TabIndex = 7;
this.num4.Text = "4";
this.num4.UseVisualStyleBackColor = true;
this.num4.Click += new System.EventHandler(this.num4_Click);
//
// num3
//
this.num3.Location = new System.Drawing.Point(449, 289);
this.num3.Name = "num3";
this.num3.Size = new System.Drawing.Size(175, 59);
this.num3.TabIndex = 8;
this.num3.Text = "3";
this.num3.UseVisualStyleBackColor = true;
this.num3.Click += new System.EventHandler(this.num3_Click);
//
// num7
//
this.num7.Location = new System.Drawing.Point(62, 502);
this.num7.Name = "num7";
this.num7.Size = new System.Drawing.Size(175, 59);
this.num7.TabIndex = 9;
this.num7.Text = "7";
this.num7.UseVisualStyleBackColor = true;
this.num7.Click += new System.EventHandler(this.num7_Click);
//
// num9
//
this.num9.Location = new System.Drawing.Point(449, 502);
this.num9.Name = "num9";
this.num9.Size = new System.Drawing.Size(175, 59);
this.num9.TabIndex = 10;
this.num9.Text = "9";
this.num9.UseVisualStyleBackColor = true;
this.num9.Click += new System.EventHandler(this.num9_Click);
//
// num8
//
this.num8.Location = new System.Drawing.Point(256, 502);
this.num8.Name = "num8";
this.num8.Size = new System.Drawing.Size(175, 59);
this.num8.TabIndex = 11;
this.num8.Text = "8";
this.num8.UseVisualStyleBackColor = true;
this.num8.Click += new System.EventHandler(this.num8_Click);
//
// num0
//
this.num0.Location = new System.Drawing.Point(256, 602);
this.num0.Name = "num0";
this.num0.Size = new System.Drawing.Size(175, 59);
this.num0.TabIndex = 12;
this.num0.Text = "0";
this.num0.UseVisualStyleBackColor = true;
this.num0.Click += new System.EventHandler(this.num0_Click);
//
// clean
//
this.clean.Location = new System.Drawing.Point(849, 289);
this.clean.Name = "clean";
this.clean.Size = new System.Drawing.Size(175, 59);
this.clean.TabIndex = 13;
this.clean.Text = "清除";
this.clean.UseVisualStyleBackColor = true;
this.clean.Click += new System.EventHandler(this.clean_Click);
//
// minus
//
this.minus.Location = new System.Drawing.Point(648, 395);
this.minus.Name = "minus";
this.minus.Size = new System.Drawing.Size(175, 59);
this.minus.TabIndex = 14;
this.minus.Text = "-";
this.minus.UseVisualStyleBackColor = true;
this.minus.Click += new System.EventHandler(this.minus_Click);
//
// multiplication
//
this.multiplication.Location = new System.Drawing.Point(648, 502);
this.multiplication.Name = "multiplication";
this.multiplication.Size = new System.Drawing.Size(175, 59);
this.multiplication.TabIndex = 15;
this.multiplication.Text = "*";
this.multiplication.UseCompatibleTextRendering = true;
this.multiplication.UseVisualStyleBackColor = true;
this.multiplication.Click += new System.EventHandler(this.multiplication_Click);
//
// division
//
this.division.Location = new System.Drawing.Point(648, 602);
this.division.Name = "division";
this.division.Size = new System.Drawing.Size(175, 59);
this.division.TabIndex = 16;
this.division.Text = "/";
this.division.UseVisualStyleBackColor = true;
this.division.Click += new System.EventHandler(this.division_Click);
//
// plus
//
this.plus.Location = new System.Drawing.Point(648, 289);
this.plus.Name = "plus";
this.plus.Size = new System.Drawing.Size(175, 59);
this.plus.TabIndex = 17;
this.plus.Text = "+";
this.plus.UseVisualStyleBackColor = true;
this.plus.Click += new System.EventHandler(this.plus_Click);
//
// equal
//
this.equal.Location = new System.Drawing.Point(449, 602);
this.equal.Name = "equal";
this.equal.Size = new System.Drawing.Size(175, 59);
this.equal.TabIndex = 18;
this.equal.Text = "=";
this.equal.UseVisualStyleBackColor = true;
this.equal.Click += new System.EventHandler(this.equal_Click);
//
// labelout
//
this.AutoScaleDimensions = new System.Drawing.SizeF(22F, 43F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(1075, 696);
this.Controls.Add(this.equal);
this.Controls.Add(this.plus);
this.Controls.Add(this.division);
this.Controls.Add(this.multiplication);
this.Controls.Add(this.minus);
this.Controls.Add(this.clean);
this.Controls.Add(this.num0);
this.Controls.Add(this.num8);
this.Controls.Add(this.num9);
this.Controls.Add(this.num7);
this.Controls.Add(this.num3);
this.Controls.Add(this.num4);
this.Controls.Add(this.num5);
this.Controls.Add(this.num6);
this.Controls.Add(this.num2);
this.Controls.Add(this.num1);
this.Controls.Add(this.labelmode);
this.Controls.Add(this.label2);
this.Controls.Add(this.labelbefore);
this.Font = new System.Drawing.Font("宋体", 25.8F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
this.Margin = new System.Windows.Forms.Padding(7, 6, 7, 6);
this.Name = "labelout";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
private Label labelbefore;
private Label label2;
private Label labelmode;
private Button num1;
private Button num2;
private Button num6;
private Button num5;
private Button num4;
private Button num3;
private Button num7;
private Button num9;
private Button num8;
private Button num0;
private Button clean;
private Button minus;
private Button multiplication;
private Button division;
private Button plus;
private Button equal;
}
}
