C编写简易计算器附源代码超详细.docx

C编写简易计算器附源代码超详细.docx

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C编写简易计算器附源代码超详细

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：

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_O、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_subbtn_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。

三、代码部分（含解释），采用switch多分支语句编写

usingSystem;

usingSystem.Drawing;

usingSystem.Collections;

usingSystem.ComponentModel;

using

usingSystem.Data;

namespaceCalc

{

///

publicclassCalcForm:

Form

{

privateButtonbtn_0;privateButtonbtn_1;privateButtonbtn_2;privateButtonbtn_3;

privateButtonbtn_4;

privateButtonbtn_5;

privateButtonbtn_6;

privateButtonbtn_7;

privateButtonbtn_8;

privateButtonbtn_9;

privateButtonbtn_add;

privateButtonbtn_sub;

privateButtonbtn_mul;

privateButtonbtn_div;

privateButtonbtn_sqrt;

privateButtonbtn_sign;

privateButtonbtn_equ;

privateButtonbtn_dot;

privateButtonbtn_rev;

privateTextBoxtxtShow;

privateButtonbtn_sqr;

privatePictureBoxpictureBox1;

privateLinkLabellinkLabel1;

///

privateSystem.ComponentModel.Containercomponents=null;publicCalcForm（）

{

//

//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//

}

///

{

if（disposing）

{

if（components!

=null）

{

components.Dispose（）;

}base.Dispose（disposing）;

}

#regionWindowsFormDesignergeneratedcode///

{

System.ComponentModel.ComponentResourceManagerresources=newSystem.ComponentModel.ComponentResourceManager（typeof（CalcForm））;

this

.btn_9=newButton（）;

this

.txtShow=newTextBox（）;

this

.btn_8=newButton（）;

this

.btn_7=newButton（）;

this

.btn_div=newButton（）;

this

.btn_sqrt=newButton（）;

this

.btn_4=newButton（）;

this

.btn_5=newButton（）;

this

.btn_6=newButton（）;

this

.btn_1=newButton（）;

this

.btn_2=newButton（）;

this

.btn_3=newButton（）;

this

.btn_0=newButton（）;

this

.btn_mul=newButton（）;

this

.btn_sub=newButton（）;

this

.btn_sign=newButton（）;

this

.btn_equ=newButton（）;

this

.btn_add=newButton（）;

this

.btn_dot=newButton（）;

this

.btn_sqr=newButton（）;

this

.btn_rev=newButton（）;

this

.pictureBox1=newPictureBox（）;

this

.linkLabel1=newLinkLabel（）;

（（System.ComponentModel.ISupportInitialize）（this.pictureBox1））.BeginInit（）;this.SuspendLayout（）;

//

//btn_9

//

this

.btn_9.BackColor=System.Drawing.SystemColors.ActiveBorder;

this

.btn_9.BackgroundImageLayout=ImageLayout.Center;

this

=System.Drawing.SystemColors.ButtonFace;

this

=System.Drawing.Color.WhiteSmoke;

this.btn_9.Font=newSystem.Drawing.Font（"黑体

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（this.btn_9.ForeColor=System.Drawing.Color.Black;

this.btn_9.Location=newSystem.Drawing.Point（126,37）;

this.btn_9.Name="btn_9";

this.btn_9.Size=newSystem.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+=newSystem.EventHandler（this.btn_0_Click）;

//

//txtShow

//

this.txtShow.Location=newSystem.Drawing.Point（4,6）;

this.txtShow.Name="txtShow";

this.txtShow.ReadOnly=true;

this.txtShow.Size=newSystem.Drawing.Size（242,21）;

this.txtShow.TabIndex=1;

this.txtShow.TextAlign=HorizontalAlignment.Right;

//

//btn_8

//

this.btn_8.BackColor=System.Drawing.SystemColors.ActiveBorder;

this.btn_8.BackgroundImageLayout=ImageLayout.Center;

.ButtonFace;

byte）（134）））;

this.btn_8.FlatAppearance.MouseDownBackColor=System.Drawing.SystemColors

this=System.Drawing.Color.WhiteSmoke;

this.btn_8.Font=newSystem.Drawing.Font（"黑体

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（this.btn_8.ForeColor=System.Drawing.Color.Black;

this.btn_8.Location=newSystem.Drawing.Point（66,37）;

this.btn_8.Name="btn_8";

this.btn_8.Size=newSystem.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+=newSystem.EventHandler（this.btn_0_Click）;

//

//btn_7

//

this.btn_7.BackColor=System.Drawing.SystemColors.ActiveBorder;

this.btn_7.BackgroundImageLayout=ImageLayout.Center;

this=System.Drawing.SystemColors.ButtonFace;

this=System.Drawing.Color.WhiteSmoke;

this.btn_7.Font=newSystem.Drawing.Font（"黑体

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（this.btn_7.ForeColor=System.Drawing.Color.Black;

this.btn_7.Location=newSystem.Drawing.Point（4,37）;

this.btn_7.Name="btn_7";

this.btn_7.Size=newSystem.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+=newSystem.EventHandler（this.btn_0_Click）;

//

//btn_div

//

this.btn_div.BackColor=System.Drawing.SystemColors.ActiveBorder;

this.btn_div.BackgroundImageLayout=ImageLayout.Center;

this=System.Drawing.SystemColors.ButtonFace;

this=System.Drawing.Color.WhiteSmoke;

this.btn_div.Font=newSystem.Drawing.Font（"黑体

byte）（134）））;

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（this.btn_div.ForeColor=System.Drawing.Color.Red;

this.btn_div.Location=newSystem.Drawing.Point（187,37）;

this.btn_div.Name="btn_div";

this.btn_div.Size=newSystem.Drawing.Size（59,31）;

this.btn_div.TabIndex=4;

this.btn_div.Text="/";

this.btn_div.UseVisualStyleBackColor=false;

this.btn_div.Click+=newSystem.EventHandler（this.btn_div_Click）;

//

//btn_sqrt

//

this.btn_sqrt.BackColor=System.Drawing.SystemColors.ActiveBorder;

this.btn_sqrt.BackgroundImageLayout=ImageLayout.Center;

this=System.Drawing.SystemColors.ButtonFace;

this=System.Drawing.Color.WhiteSmoke;

this.btn_sqrt.Font=newSystem.Drawing.Font（"黑体

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（this.btn_sqrt.ForeColor=System.Drawing.Color.Black;

this.btn_sqrt.Location=newSystem.Drawing.Point（253,37）;

this.btn_sqrt.Name="btn_sqrt";

this.btn_sqrt.Size=newSystem.Drawing.Size（59,31）;

this.btn_sqrt.TabIndex=5;

this.btn_sqrt.Text="开方";

byte）（134）））;

byte）（134）））;

this.btn_sqrt.UseVisualStyleBackColor=false;

this.btn_sqrt.Click+=newSystem.EventHandler（this.btn_sqrt_Click）;

//

//btn_4

//

this.btn_4.BackColor=System.Drawing.SystemColors.ActiveBorder;

this.btn_4.BackgroundImageLayout=ImageLayout.Center;

this=System.Drawing.SystemColors.ButtonFace;

this=System.Drawing.Color.WhiteSmoke;

this.btn_4.Font=newSystem.Drawing.Font（"黑体

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（this.btn_4.ForeColor=System.Drawing.Color.Black;

this.btn_4.Location=newSystem.Drawing.Point（4,72）;

this.btn_4.Name="btn_4";

this.btn_4.Size=newSystem.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+=newSystem.EventHandler（this.btn_0_Click）;

//

//btn_5

//

this.btn_5.BackColor=System.Drawing.SystemColors.ActiveBorder;

this.btn_5.BackgroundImageLayout=ImageLayout.Center;

this=System.Drawing.SystemColors.ButtonFace;

this=System.Drawing.Color.WhiteSmoke;

this.btn_5.Font=newSystem.Drawing.Font（"黑体

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（this.btn_5.ForeColor=System.Drawing.Color.Black;

this.btn_5.Location=newSystem.Drawing.Point（66,72）;

this.btn_5.Name="btn_5";

this.btn_5.Size=newSystem.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+=newSystem.EventHandler（this.btn_0_Click）;

//

//btn_6

//

this.btn_6.BackColor=System.Drawing.SystemColors.ActiveBorder;

this.btn_6.BackgroundImageLayout=ImageLayout.Center;

this=System.Drawing.SystemColors.ButtonFace;

this=System.Drawing.Color.WhiteSmoke;

this.btn_6.Font=newSystem.Drawing.Font（"黑体

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（

this.btn_6.ForeColor=System.Drawing.Color.Black;

this.btn_6.Location=newSystem.Drawing.Point（126,72）;

this.btn_6.Name="btn_6";

this.btn_6.Size=newSystem.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+=newSystem.EventHandler（this.btn_0_Click）;

//

//btn_1

//

this.btn_1.BackColor=System.Drawing.SystemColors.ActiveBorder;

this.btn_1.BackgroundImageLayout=ImageLayout.Center;

this=System.Drawing.SystemColors.ButtonFace;

this=System.Drawing.Color.WhiteSmoke;

this.btn_1.Font=newSystem.Drawing.Font（"黑体

byte）（134）））;

",10.5F,System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,（（this.btn_1.ForeColor=System.Drawing.Color.Black;

this.btn_1.Location=newSystem.Drawing.Point（4,108）;

this.btn_1.Name="btn_1";

this.btn_1.Size=newSystem.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+=newSystem.EventHandler（this.btn_0_Click）;

//

//btn_2

//

th