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这篇文章主要讲解了“C#怎么实现计算器四则运算”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“C#怎么实现计算器四则运算”吧！
初始化，实现四则运算
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 WindowsFormsAppCalculator
{
public partial class Form1 : Form
{
double number1 = 0;
double number2 = 0;
double result;
int inputNumber;
enum Operator { none, plus, minus, multiplication, division}//判断运算法则
Operator mode = Operator.none;
bool isequal = false;
public Form1()
{
InitializeComponent();
}
private void num1_Click(object sender, EventArgs e)
{
inputNumber = 1;
WindowsFormsAppCalculator(inputNumber);
//number1 = number1 * 10 + 1;
//labelout.Text = Convert.ToString(number1);
}
private void num2_Click(object sender, EventArgs e)
{
inputNumber = 2;
WindowsFormsAppCalculator(inputNumber);
}
private void num3_Click(object sender, EventArgs e)
{
inputNumber = 3;
WindowsFormsAppCalculator(inputNumber);
}
private void num4_Click(object sender, EventArgs e)
{
inputNumber = 4;
WindowsFormsAppCalculator(inputNumber);
}
private void num5_Click(object sender, EventArgs e)
{
inputNumber = 5;
WindowsFormsAppCalculator(inputNumber);
}
private void num6_Click(object sender, EventArgs e)
{
inputNumber = 6;
WindowsFormsAppCalculator(inputNumber);
}
private void num7_Click(object sender, EventArgs e)
{
inputNumber = 7;
WindowsFormsAppCalculator(inputNumber);
}
private void num8_Click(object sender, EventArgs e)
{
inputNumber = 8;
WindowsFormsAppCalculator(inputNumber);
}
private void num9_Click(object sender, EventArgs e)
{
inputNumber = 9;
WindowsFormsAppCalculator(inputNumber);
}
private void num0_Click(object sender, EventArgs e)
{
inputNumber = 0;
WindowsFormsAppCalculator(inputNumber);
}
private void Form1_Load(object sender, EventArgs e)
{
labelout.Text = Convert.ToString(number1);
}
private void clean_Click(object sender, EventArgs e)
{
cleanAll();
}
public void WindowsFormsAppCalculator(int an) //不懂这段怎么来的
{
if (mode == Operator.none)
{
number1 = number1 * 10 + an;
labelout.Text = Convert.ToString(number1);
}
else
{
number2 = number2 * 10 + an;
labelout.Text = Convert.ToString(number2);
}
}
private void plus_Click(object sender, EventArgs e)
{
mode = Operator.plus;
switchmode();
//isequal = true;
}
private void minus_Click(object sender, EventArgs e)
{
mode = Operator.minus;
switchmode();
}
private void multiplication_Click(object sender, EventArgs e)
{
mode = Operator.multiplication;
switchmode();
}
private void division_Click(object sender, EventArgs e)
{
mode = Operator.division;
switchmode();
}
private void equal_Click(object sender, EventArgs e)
{
switch (mode)
{
case Operator.plus:
result = number1 + number2;
break;
case Operator.minus:
result = number1 - number2;
break;
case Operator.multiplication:
result = number1 * number2;
break;
case Operator.division:
result = number1 / number2;
break;
}
isequal = true;
labelbefore.Text = "";
labelmode.Text = "";
labelout.Text = Convert.ToString(result);
}
public void cleanAll()
{
number1 = 0;
number2 = 0;
labelout.Text = Convert.ToString(number1);
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.division:
labelmode.Text = "/";
break;
}
//isequal = true;
//cleanAll();
labelbefore.Text = Convert.ToString(number1);
labelout.Text = Convert.ToString(number2);
}
}
}namespace WindowsFormsAppCalculator
{
partial class Form1
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要修改
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.labelout = new System.Windows.Forms.Label();
this.labelbefore = new System.Windows.Forms.Label();
this.labelmode = new System.Windows.Forms.Label();
this.num1 = new System.Windows.Forms.Button();
this.num6 = new System.Windows.Forms.Button();
this.num8 = new System.Windows.Forms.Button();
this.num7 = new System.Windows.Forms.Button();
this.num5 = new System.Windows.Forms.Button();
this.num4 = new System.Windows.Forms.Button();
this.num9 = new System.Windows.Forms.Button();
this.num2 = new System.Windows.Forms.Button();
this.num3 = 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();
//
// labelout
//
this.labelout.Font = new System.Drawing.Font("宋体", 25.8F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
this.labelout.Location = new System.Drawing.Point(26, 111);
this.labelout.Name = "labelout";
this.labelout.Size = new System.Drawing.Size(463, 49);
this.labelout.TabIndex = 0;
this.labelout.TextAlign = System.Drawing.ContentAlignment.BottomRight;
//
// labelbefore
//
this.labelbefore.Font = new System.Drawing.Font("宋体", 22.2F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
this.labelbefore.Location = new System.Drawing.Point(27, 9);
this.labelbefore.Name = "labelbefore";
this.labelbefore.Size = new System.Drawing.Size(463, 43);
this.labelbefore.TabIndex = 1;
this.labelbefore.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, ((byte)(134)));
this.labelmode.Location = new System.Drawing.Point(28, 61);
this.labelmode.Name = "labelmode";
this.labelmode.Size = new System.Drawing.Size(463, 39);
this.labelmode.TabIndex = 2;
this.labelmode.TextAlign = System.Drawing.ContentAlignment.BottomRight;
//
// num1
//
this.num1.Location = new System.Drawing.Point(35, 199);
this.num1.Name = "num1";
this.num1.Size = new System.Drawing.Size(71, 41);
this.num1.TabIndex = 3;
this.num1.Text = "1";
this.num1.UseVisualStyleBackColor = true;
this.num1.Click += new System.EventHandler(this.num1_Click);
//
// num6
//
this.num6.Location = new System.Drawing.Point(218, 253);
this.num6.Name = "num6";
this.num6.Size = new System.Drawing.Size(71, 41);
this.num6.TabIndex = 6;
this.num6.Text = "6";
this.num6.UseVisualStyleBackColor = true;
this.num6.Click += new System.EventHandler(this.num6_Click);
//
// num8
//
this.num8.Location = new System.Drawing.Point(130, 312);
this.num8.Name = "num8";
this.num8.Size = new System.Drawing.Size(71, 41);
this.num8.TabIndex = 7;
this.num8.Text = "8";
this.num8.UseVisualStyleBackColor = true;
this.num8.Click += new System.EventHandler(this.num8_Click);
//
// num7
//
this.num7.Location = new System.Drawing.Point(35, 312);
this.num7.Name = "num7";
this.num7.Size = new System.Drawing.Size(71, 41);
this.num7.TabIndex = 8;
this.num7.Text = "7";
this.num7.UseVisualStyleBackColor = true;
this.num7.Click += new System.EventHandler(this.num7_Click);
//
// num5
//
this.num5.Location = new System.Drawing.Point(130, 253);
this.num5.Name = "num5";
this.num5.Size = new System.Drawing.Size(71, 41);
this.num5.TabIndex = 9;
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(35, 253);
this.num4.Name = "num4";
this.num4.Size = new System.Drawing.Size(71, 41);
this.num4.TabIndex = 10;
this.num4.Text = "4";
this.num4.UseVisualStyleBackColor = true;
this.num4.Click += new System.EventHandler(this.num4_Click);
//
// num9
//
this.num9.Location = new System.Drawing.Point(218, 312);
this.num9.Name = "num9";
this.num9.Size = new System.Drawing.Size(71, 41);
this.num9.TabIndex = 11;
this.num9.Text = "9";
this.num9.UseVisualStyleBackColor = true;
this.num9.Click += new System.EventHandler(this.num9_Click);
//
// num2
//
this.num2.Location = new System.Drawing.Point(130, 199);
this.num2.Name = "num2";
this.num2.Size = new System.Drawing.Size(71, 41);
this.num2.TabIndex = 12;
this.num2.Text = "2";
this.num2.UseVisualStyleBackColor = true;
this.num2.Click += new System.EventHandler(this.num2_Click);
//
// num3
//
this.num3.Location = new System.Drawing.Point(218, 199);
this.num3.Name = "num3";
this.num3.Size = new System.Drawing.Size(71, 41);
this.num3.TabIndex = 13;
this.num3.Text = "3";
this.num3.UseVisualStyleBackColor = true;
this.num3.Click += new System.EventHandler(this.num3_Click);
//
// num0
//
this.num0.Location = new System.Drawing.Point(130, 372);
this.num0.Name = "num0";
this.num0.Size = new System.Drawing.Size(71, 41);
this.num0.TabIndex = 14;
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(387, 199);
this.clean.Name = "clean";
this.clean.Size = new System.Drawing.Size(71, 41);
this.clean.TabIndex = 15;
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(305, 253);
this.minus.Name = "minus";
this.minus.Size = new System.Drawing.Size(71, 41);
this.minus.TabIndex = 16;
this.minus.Text = "-";
this.minus.UseVisualStyleBackColor = true;
this.minus.Click += new System.EventHandler(this.minus_Click);
//
// multiplication
//
this.multiplication.Location = new System.Drawing.Point(305, 312);
this.multiplication.Name = "multiplication";
this.multiplication.Size = new System.Drawing.Size(71, 41);
this.multiplication.TabIndex = 17;
this.multiplication.Text = "*";
this.multiplication.UseVisualStyleBackColor = true;
this.multiplication.Click += new System.EventHandler(this.multiplication_Click);
//
// division
//
this.division.Location = new System.Drawing.Point(305, 372);
this.division.Name = "division";
this.division.Size = new System.Drawing.Size(71, 41);
this.division.TabIndex = 18;
this.division.Text = "/";
this.division.UseVisualStyleBackColor = true;
this.division.Click += new System.EventHandler(this.division_Click);
//
// plus
//
this.plus.Location = new System.Drawing.Point(305, 199);
this.plus.Name = "plus";
this.plus.Size = new System.Drawing.Size(71, 41);
this.plus.TabIndex = 19;
this.plus.Text = "+";
this.plus.UseVisualStyleBackColor = true;
this.plus.Click += new System.EventHandler(this.plus_Click);
//
// equal
//
this.equal.Location = new System.Drawing.Point(218, 372);
this.equal.Name = "equal";
this.equal.Size = new System.Drawing.Size(71, 41);
this.equal.TabIndex = 20;
this.equal.Text = "=";
this.equal.UseVisualStyleBackColor = true;
this.equal.Click += new System.EventHandler(this.equal_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 15F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(502, 466);
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.num3);
this.Controls.Add(this.num2);
this.Controls.Add(this.num9);
this.Controls.Add(this.num4);
this.Controls.Add(this.num5);
this.Controls.Add(this.num7);
this.Controls.Add(this.num8);
this.Controls.Add(this.num6);
this.Controls.Add(this.num1);
this.Controls.Add(this.labelmode);
this.Controls.Add(this.labelbefore);
this.Controls.Add(this.labelout);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.Label labelout;
private System.Windows.Forms.Label labelbefore;
private System.Windows.Forms.Label labelmode;
private System.Windows.Forms.Button num1;
private System.Windows.Forms.Button num6;
private System.Windows.Forms.Button num8;
private System.Windows.Forms.Button num7;
private System.Windows.Forms.Button num5;
private System.Windows.Forms.Button num4;
private System.Windows.Forms.Button num9;
private System.Windows.Forms.Button num2;
private System.Windows.Forms.Button num3;
private System.Windows.Forms.Button num0;
private System.Windows.Forms.Button clean;
private System.Windows.Forms.Button minus;
private System.Windows.Forms.Button multiplication;
private System.Windows.Forms.Button division;
private System.Windows.Forms.Button plus;
private System.Windows.Forms.Button equal;
}
}感谢各位的阅读，以上就是“C#怎么实现计算器四则运算”的内容了，经过本文的学习后，相信大家对C#怎么实现计算器四则运算这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是亿速云，小编将为大家推送更多相关知识点的文章，欢迎关注！
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