用c#编写的计算器

用C#编写的计算器 超详细 因为计算器设计的控件太多，不便使用控制台应用程序完成，所以这里使用Windows窗体应用程序，并命名为Calc,如下图所示： 向窗体中拖入需要的控件，如下图所示： （完成效果图） 结果显示区（作者博客左边的文本框）是TextBox控件，并修改其name为txtShow ，按键0~9为Button控件，并将其name分别修改为btn_0、btn_1、btn_2、btn_3、btn_4、btn_5、btn_6、btn_7、btn_8、btn_9；按键【负数】的name值修改为btn_sign，按键【.】的name修改为btn_dot，按键【+ - * /】的name值分别修改为btn_add、btn_sub、btn_mul、btn_div，按键【=】的name值修改为btn_equ，按键【倒数】的name值修改为btn_rev，按键【平方】的name值修改为btn_sqr，按键【开方】的name值修改为btn_sqrt。右边的计算器图片空间是PictureBox，作者博客控件是LinkLabel，可以不添加，以上所有控件均可按照需求添加，只保留自己需要的按钮控件和textbox控件即可。 代码部分（含解释），采用switch多分支语句编写 using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace Calc { ///

/// QQ:479340056 温柔一刀C#简易计算器的实现 ///

public class CalcForm : System.Windows.Forms.Form { private System.Windows.Forms.Button btn_0; private System.Windows.Forms.Button btn_1; private System.Windows.Forms.Button btn_2; private System.Windows.Forms.Button btn_3; private System.Windows.Forms.Button btn_4; private System.Windows.Forms.Button btn_5; private System.Windows.Forms.Button btn_6; private System.Windows.Forms.Button btn_7; private System.Windows.Forms.Button btn_8; private System.Windows.Forms.Button btn_9; private System.Windows.Forms.Button btn_add; private System.Windows.Forms.Button btn_sub; private System.Windows.Forms.Button btn_mul; private System.Windows.Forms.Button btn_div; private System.Windows.Forms.Button btn_sqrt; private System.Windows.Forms.Button btn_sign; private System.Windows.Forms.Button btn_equ; private System.Windows.Forms.Button btn_dot; private System.Windows.Forms.Button btn_rev; private System.Windows.Forms.TextBox txtShow; private System.Windows.Forms.Button btn_sqr; private PictureBox pictureBox1; private LinkLabel linkLabel1; ///

/// 必需的设计器变量。 ///

private System.ComponentModel.Container components = null; public CalcForm() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在InitializeComponent 调用后添加任何构造函数代码 // } ///

/// 清理所有正在使用的资源。 ///

protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code ///

/// 设计器支持所需的方法- 不要使用代码编辑器修改 /// 此方法的内容。 ///

private void InitializeComponent() { System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(CalcForm)); this.btn_9 = new System.Windows.Forms.Button(); this.txtShow = new System.Windows.Forms.TextBox(); this.btn_8 = new System.Windows.Forms.Button(); this.btn_7 = new System.Windows.Forms.Button(); this.btn_div = new System.Windows.Forms.Button(); this.btn_sqrt = new System.Windows.Forms.Button(); this.btn_4 = new System.Windows.Forms.Button(); this.btn_5 = new System.Windows.Forms.Button(); this.btn_6 = new System.Windows.Forms.Button(); this.btn_1 = new System.Windows.Forms.Button(); this.btn_2 = new System.Windows.Forms.Button(); this.btn_3 = new System.Windows.Forms.Button(); this.btn_0 = new System.Windows.Forms.Button(); this.btn_mul = new System.Windows.Forms.Button(); this.btn_sub = new System.Windows.Forms.Button(); this.btn_sign = new System.Windows.Forms.Button(); this.btn_equ = new System.Windows.Forms.Button(); this.btn_add = new System.Windows.Forms.Button(); this.btn_dot = new System.Windows.Forms.Button(); this.btn_sqr = new System.Windows.Forms.Button(); this.btn_rev = new System.Windows.Forms.Button(); this.pictureBox1 = new System.Windows.Forms.PictureBox(); this.linkLabel1 = new System.Windows.Forms.LinkLabel(); ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit(); this.SuspendLayout(); // // btn_9 // this.btn_9.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_9.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_9.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_9.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_9.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_9.ForeColor = System.Drawing.Color.Black; this.btn_9.Location = new System.Drawing.Point(126, 37); this.btn_9.Name = "btn_9"; this.btn_9.Size = new System.Drawing.Size(59, 31); this.btn_9.TabIndex = 0; this.btn_9.Tag = "9"; this.btn_9.Text = "9"; this.btn_9.UseVisualStyleBackColor = false; this.btn_9.Click += new System.EventHandler(this.btn_0_Click); // // txtShow // this.txtShow.Location = new System.Drawing.Point(4, 6); this.txtShow.Name = "txtShow"; this.txtShow.ReadOnly = true; this.txtShow.Size = new System.Drawing.Size(242, 21); this.txtShow.TabIndex = 1; this.txtShow.TextAlign = System.Windows.Forms.HorizontalAlignment.Right; // // btn_8 // this.btn_8.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_8.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_8.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_8.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_8.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_8.ForeColor = System.Drawing.Color.Black; this.btn_8.Location = new System.Drawing.Point(66, 37); this.btn_8.Name = "btn_8"; this.btn_8.Size = new System.Drawing.Size(59, 31); this.btn_8.TabIndex = 2; this.btn_8.Tag = "8"; this.btn_8.Text = "8"; this.btn_8.UseVisualStyleBackColor = false; this.btn_8.Click += new System.EventHandler(this.btn_0_Click); // // btn_7 // this.btn_7.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_7.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_7.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_7.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_7.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_7.ForeColor = System.Drawing.Color.Black; this.btn_7.Location = new System.Drawing.Point(4, 37); this.btn_7.Name = "btn_7"; this.btn_7.Size = new System.Drawing.Size(59, 31); this.btn_7.TabIndex = 3; this.btn_7.Tag = "7"; this.btn_7.Text = "7"; this.btn_7.UseVisualStyleBackColor = false; this.btn_7.Click += new System.EventHandler(this.btn_0_Click); // // btn_div // this.btn_div.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_div.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_div.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_div.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_div.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_div.ForeColor = System.Drawing.Color.Red; this.btn_div.Location = new System.Drawing.Point(187, 37); this.btn_div.Name = "btn_div"; this.btn_div.Size = new System.Drawing.Size(59, 31); this.btn_div.TabIndex = 4; this.btn_div.Text = "/"; this.btn_div.UseVisualStyleBackColor = false; this.btn_div.Click += new System.EventHandler(this.btn_div_Click); // // btn_sqrt // this.btn_sqrt.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_sqrt.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_sqrt.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_sqrt.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_sqrt.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_sqrt.ForeColor = System.Drawing.Color.Black; this.btn_sqrt.Location = new System.Drawing.Point(253, 37); this.btn_sqrt.Name = "btn_sqrt"; this.btn_sqrt.Size = new System.Drawing.Size(59, 31); this.btn_sqrt.TabIndex = 5; this.btn_sqrt.Text = "开方"; this.btn_sqrt.UseVisualStyleBackColor = false; this.btn_sqrt.Click += new System.EventHandler(this.btn_sqrt_Click); // // btn_4 // this.btn_4.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_4.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_4.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_4.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_4.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_4.ForeColor = System.Drawing.Color.Black; this.btn_4.Location = new System.Drawing.Point(4, 72); this.btn_4.Name = "btn_4"; this.btn_4.Size = new System.Drawing.Size(59, 31); this.btn_4.TabIndex = 6; this.btn_4.Tag = "4"; this.btn_4.Text = "4"; this.btn_4.UseVisualStyleBackColor = false; this.btn_4.Click += new System.EventHandler(this.btn_0_Click); // // btn_5 // this.btn_5.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_5.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_5.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_5.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_5.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_5.ForeColor = System.Drawing.Color.Black; this.btn_5.Location = new System.Drawing.Point(66, 72); this.btn_5.Name = "btn_5"; this.btn_5.Size = new System.Drawing.Size(59, 31); this.btn_5.TabIndex = 7; this.btn_5.Tag = "5"; this.btn_5.Text = "5"; this.btn_5.UseVisualStyleBackColor = false; this.btn_5.Click += new System.EventHandler(this.btn_0_Click); // // btn_6 // this.btn_6.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_6.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_6.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_6.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_6.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_6.ForeColor = System.Drawing.Color.Black; this.btn_6.Location = new System.Drawing.Point(126, 72); this.btn_6.Name = "btn_6"; this.btn_6.Size = new System.Drawing.Size(59, 31); this.btn_6.TabIndex = 8; this.btn_6.Tag = "6"; this.btn_6.Text = "6"; this.btn_6.UseVisualStyleBackColor = false; this.btn_6.Click += new System.EventHandler(this.btn_0_Click); // // btn_1 // this.btn_1.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_1.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_1.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_1.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_1.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_1.ForeColor = System.Drawing.Color.Black; this.btn_1.Location = new System.Drawing.Point(4, 108); this.btn_1.Name = "btn_1"; this.btn_1.Size = new System.Drawing.Size(59, 31); this.btn_1.TabIndex = 9; this.btn_1.Tag = "1"; this.btn_1.Text = "1"; this.btn_1.UseVisualStyleBackColor = false; this.btn_1.Click += new System.EventHandler(this.btn_0_Click); // // btn_2 // this.btn_2.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_2.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_2.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_2.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_2.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_2.ForeColor = System.Drawing.Color.Black; this.btn_2.Location = new System.Drawing.Point(66, 108); this.btn_2.Name = "btn_2"; this.btn_2.Size = new System.Drawing.Size(59, 31); this.btn_2.TabIndex = 10; this.btn_2.Tag = "2"; this.btn_2.Text = "2"; this.btn_2.UseVisualStyleBackColor = false; this.btn_2.Click += new System.EventHandler(this.btn_0_Click); // // btn_3 // this.btn_3.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_3.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_3.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_3.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_3.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_3.ForeColor = System.Drawing.Color.Black; this.btn_3.Location = new System.Drawing.Point(126, 108); this.btn_3.Name = "btn_3"; this.btn_3.Size = new System.Drawing.Size(59, 31); this.btn_3.TabIndex = 11; this.btn_3.Tag = "3"; this.btn_3.Text = "3"; this.btn_3.UseVisualStyleBackColor = false; this.btn_3.Click += new System.EventHandler(this.btn_0_Click); // // btn_0 // this.btn_0.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_0.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_0.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_0.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_0.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_0.ForeColor = System.Drawing.Color.Black; this.btn_0.Location = new System.Drawing.Point(4, 143); this.btn_0.Name = "btn_0"; this.btn_0.Size = new System.Drawing.Size(59, 31); this.btn_0.TabIndex = 12; this.btn_0.Tag = "0"; this.btn_0.Text = "0"; this.btn_0.UseVisualStyleBackColor = false; this.btn_0.Click += new System.EventHandler(this.btn_0_Click); // // btn_mul // this.btn_mul.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_mul.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_mul.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_mul.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_mul.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_mul.ForeColor = System.Drawing.Color.Red; this.btn_mul.Location = new System.Drawing.Point(187, 72); this.btn_mul.Name = "btn_mul"; this.btn_mul.Size = new System.Drawing.Size(59, 31); this.btn_mul.TabIndex = 13; this.btn_mul.Text = "*"; this.btn_mul.UseVisualStyleBackColor = false; this.btn_mul.Click += new System.EventHandler(this.btn_mul_Click); // // btn_sub // this.btn_sub.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_sub.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_sub.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_sub.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_sub.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_sub.ForeColor = System.Drawing.Color.Red; this.btn_sub.Location = new System.Drawing.Point(187, 108); this.btn_sub.Name = "btn_sub"; this.btn_sub.Size = new System.Drawing.Size(59, 31); this.btn_sub.TabIndex = 14; this.btn_sub.Text = "-"; this.btn_sub.UseVisualStyleBackColor = false; this.btn_sub.Click += new System.EventHandler(this.btn_sub_Click); // // btn_sign // this.btn_sign.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_sign.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_sign.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_sign.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_sign.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_sign.ForeColor = System.Drawing.Color.Red; this.btn_sign.Location = new System.Drawing.Point(66, 143); this.btn_sign.Name = "btn_sign"; this.btn_sign.Size = new System.Drawing.Size(59, 31); this.btn_sign.TabIndex = 15; this.btn_sign.Text = "负数"; this.btn_sign.UseVisualStyleBackColor = false; this.btn_sign.Click += new System.EventHandler(this.btn_sign_Click); // // btn_equ // this.btn_equ.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_equ.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_equ.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_equ.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_equ.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_equ.ForeColor = System.Drawing.Color.Red; this.btn_equ.Location = new System.Drawing.Point(253, 143); this.btn_equ.Name = "btn_equ"; this.btn_equ.Size = new System.Drawing.Size(59, 31); this.btn_equ.TabIndex = 16; this.btn_equ.Text = "="; this.btn_equ.UseVisualStyleBackColor = false; this.btn_equ.Click += new System.EventHandler(this.btn_equ_Click); // // btn_add // this.btn_add.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_add.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_add.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_add.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_add.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_add.ForeColor = System.Drawing.Color.Red; this.btn_add.Location = new System.Drawing.Point(187, 143); this.btn_add.Name = "btn_add"; this.btn_add.Size = new System.Drawing.Size(59, 31); this.btn_add.TabIndex = 17; this.btn_add.Text = "+"; this.btn_add.UseVisualStyleBackColor = false; this.btn_add.Click += new System.EventHandler(this.btn_add_Click); // // btn_dot // this.btn_dot.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_dot.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_dot.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_dot.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_dot.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_dot.ForeColor = System.Drawing.Color.Black; this.btn_dot.Location = new System.Drawing.Point(126, 143); this.btn_dot.Name = "btn_dot"; this.btn_dot.Size = new System.Drawing.Size(59, 31); this.btn_dot.TabIndex = 18; this.btn_dot.Text = "."; this.btn_dot.UseVisualStyleBackColor = false; this.btn_dot.Click += new System.EventHandler(this.btn_dot_Click); // // btn_sqr // this.btn_sqr.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_sqr.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_sqr.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_sqr.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_sqr.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_sqr.ForeColor = System.Drawing.Color.Black; this.btn_sqr.Location = new System.Drawing.Point(253, 72); this.btn_sqr.Name = "btn_sqr"; this.btn_sqr.Size = new System.Drawing.Size(59, 31); this.btn_sqr.TabIndex = 19; this.btn_sqr.Text = "平方"; this.btn_sqr.UseVisualStyleBackColor = false; this.btn_sqr.Click += new System.EventHandler(this.btn_sqr_Click); // // btn_rev // this.btn_rev.BackColor = System.Drawing.SystemColors.ActiveBorder; this.btn_rev.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.btn_rev.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonFace; this.btn_rev.FlatAppearance.MouseOverBackColor = System.Drawing.Color.WhiteSmoke; this.btn_rev.Font = new System.Drawing.Font("黑体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btn_rev.ForeColor = System.Drawing.Color.Red; this.btn_rev.Location = new System.Drawing.Point(253, 108); this.btn_rev.Name = "btn_rev"; this.btn_rev.Size = new System.Drawing.Size(59, 31); this.btn_rev.TabIndex = 20; this.btn_rev.Text = "倒数"; this.btn_rev.UseVisualStyleBackColor = false; this.btn_rev.Click += new System.EventHandler(this.btn_rev_Click); // // pictureBox1 // this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image"))); this.pictureBox1.Location = new System.Drawing.Point(319, 6); this.pictureBox1.Name = "pictureBox1"; this.pictureBox1.Size = new System.Drawing.Size(100, 168); this.pictureBox1.TabIndex = 21; this.pictureBox1.TabStop = false; // // linkLabel1 // this.linkLabel1.AutoSize = true; this.linkLabel1.Location = new System.Drawing.Point(253, 13); this.linkLabel1.Name = "linkLabel1"; this.linkLabel1.Size = new System.Drawing.Size(53, 12); this.linkLabel1.TabIndex = 22; this.linkLabel1.TabStop = true; this.linkLabel1.Text = "作者博客"; this.linkLabel1.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkLabel1_LinkClicked); // // CalcForm // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(427, 181); this.Controls.Add(this.linkLabel1); this.Controls.Add(this.pictureBox1); this.Controls.Add(this.btn_rev); this.Controls.Add(this.btn_sqr); this.Controls.Add(this.btn_dot); this.Controls.Add(this.btn_add); this.Controls.Add(this.btn_equ); this.Controls.Add(this.btn_sign); this.Controls.Add(this.btn_sub); this.Controls.Add(this.btn_mul); this.Controls.Add(this.btn_0); this.Controls.Add(this.btn_3); this.Controls.Add(this.btn_2); this.Controls.Add(this.btn_1); this.Controls.Add(this.btn_6); this.Controls.Add(this.btn_5); this.Controls.Add(this.btn_4); this.Controls.Add(this.btn_sqrt); this.Controls.Add(this.btn_div); this.Controls.Add(this.btn_7); this.Controls.Add(this.btn_8); this.Controls.Add(this.txtShow); this.Controls.Add(this.btn_9); this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog; this.MaximizeBox = false; this.Name = "CalcForm"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "C#编写计算器by QQ:479340056 "; this.Load += new System.EventHandler(this.CalcForm_Load); ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit(); this.ResumeLayout(false); this.PerformLayout(); } #endregion public const int NULL = 0; // 定义操作码 public const int ADD = 1; public const int SUB = 2; public const int MUL = 3; public const int DIV = 4; public const int SQR = 5; public const int SQRT = 6; public const int NODOT = 0; // 定义是否点击了小数点 public const int HASDOT = 1; private double res = 0; // 记录结果数 private double tmp = 0; // 当前输入的操作数 private int opt = NULL; // 记录操作码 private int dot = NODOT; // 记录是否点击了小数点 private int num = 0; // 记录输入操作数的个数 private int dotnum = 0; // 记录小数点部分的个数 ///

/// 应用程序的主入口点。 ///

[STAThread] static void Main() { Application.Run(new CalcForm()); } ///

/// 当点击一个数字按钮的时候，需要进行判断，如果没有点击 /// 小数点，那么就把原来的数值扩大倍后再加上当前的数值， /// 如果点击了小数点，那么就将当前的数值除以一个权数，再 /// 加上原来的数值，得到新的数值。 ///

/// /// private void btn_0_Click(object sender, System.EventArgs e) { System.Windows.Forms.Button btnTmp; double i; btnTmp = sender as System.Windows.Forms.Button; if (btnTmp != null) { if (dot == NODOT) { // 没有点击小数点 i = double.Parse(btnTmp.Tag.ToString()); tmp = tmp * 10 + i; txtShow.Text = tmp.ToString(); } else { // 点击了小数点 dotnum++; // 生成小数部分的新的数值 i = double.Parse(btnTmp.Tag.ToString()) / System.Math.Pow(10,dotnum); tmp = tmp + i; txtShow.Text = tmp.ToString(); } } } private void btn_equ_Click(object sender, System.EventArgs e) { // 生成结果 if (num == 0) { res = 0; tmp = 0; txtShow.Text = res.ToString(); return; } switch (opt) { // 加法 case ADD: res = res + tmp; break; // 减法 case SUB: res = res - tmp; break; // 乘法 case MUL: res = res * tmp; break; // 除法 case DIV: res = res / tmp; break; // 平方 case SQR: res = tmp * tmp; break; // 平方根 case SQRT: res = System.Math.Sqrt(tmp); break; default: return; } txtShow.Text = res.ToString(); opt = NULL; res = 0; num = 0; } private void btn_div_Click(object sender, System.EventArgs e) { // 除法运算 opt = DIV; if (num != 0) { if (tmp != 0) res = res / tmp; } else res = tmp; num++; tmp = 0; txtShow.Text = res.ToString(); } private void btn_mul_Click(object sender, System.EventArgs e) { // 乘法运算 opt = MUL; if (num != 0) res = res * tmp; else res = tmp; num++; tmp = 0; txtShow.Text = res.ToString(); } private void btn_sub_Click(object sender, System.EventArgs e) { // 减法运算 opt = SUB; if (num != 0) res = res - tmp; else res = tmp; num++; tmp = 0; txtShow.Text = res.ToString(); } private void btn_add_Click(object sender, System.EventArgs e) { // 加法运算 opt = ADD; if (num != 0) res = res + tmp; else res = tmp; num++; tmp = 0; txtShow.Text = res.ToString(); } private void btn_sqrt_Click(object sender, System.EventArgs e) { // 开方运算 if (tmp > 0) { tmp = Math.Sqrt(tmp); txtShow.Text = tmp.ToString(); } } private void btn_sqr_Click(object sender, System.EventArgs e) { // 平方运算 tmp = tmp * tmp; txtShow.Text = tmp.ToString(); } private void btn_rev_Click(object sender, System.EventArgs e) { // 求倒数运算 tmp = 1 / tmp; txtShow.Text = tmp.ToString(); } private void btn_dot_Click(object sender, System.EventArgs e) { // 点击了小数点 dot = HASDOT; dotnum = 0; } private void btn_sign_Click(object sender, System.EventArgs e) { // 点击了符号运算 tmp = -tmp; txtShow.Text = tmp.ToString(); } private void CalcForm_Load(object sender, EventArgs e) { } private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { System.Diagnostics.Process.Start("http://479340056.qzone.qq.com"); } } } 说明 这里只提供了一种方法，另外以上代码中有很多是用于字体颜色设置，可以精简掉，很容易分辨 。 linkLabel1单击打开网页的事件 private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { System.Diagnostics.Process.Start("http://479340056.qzone.qq.com"); } 是一般用不到的。 尽量不要直接粘贴代码到Form1.cs，自己动手，丰衣足食···