用c#编写计算器代码,只要加减乘除就行了

2025年02月17日 12:07

有5个网友回答

网友（1）：

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace jisuan
{
///

/// Form1 的摘要说明。
///

public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.ComboBox comboBox1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
///

/// 必需的设计器变量。
///

private System.ComponentModel.Container components = null;

public Form1()
{
//
// 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 窗体设计器生成的代码
///

/// 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()
{
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.comboBox1 = new System.Windows.Forms.ComboBox();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(24, 72);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(100, 21);
this.textBox1.TabIndex = 0;
this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(312, 72);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(100, 21);
this.textBox2.TabIndex = 1;
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(448, 72);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(88, 21);
this.textBox3.TabIndex = 2;
//
// comboBox1
//
this.comboBox1.Items.AddRange(new object[] {
"+",
"-",
"*",
"/"});
this.comboBox1.Location = new System.Drawing.Point(152, 72);
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(121, 20);
this.comboBox1.TabIndex = 3;
this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);
//
// button1
//
this.button1.Location = new System.Drawing.Point(64, 184);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(104, 32);
this.button1.TabIndex = 4;
this.button1.Text = "计算";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(216, 192);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(75, 23);
this.button2.TabIndex = 5;
this.button2.Text = "清除";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(376, 192);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(75, 23);
this.button3.TabIndex = 6;
this.button3.Text = "退出";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(656, 366);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.comboBox1);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.PerformLayout();

}
#endregion

///

/// 应用程序的主入口点。
///

[STAThread]
static void Main()
{
Application.Run(new Form1());
}
public double jia(double a,double b)
{
return a+b;
}
public double jian(double a,double b)
{
return a-b;
}
public double cheng(double a,double b)
{
return a*b;
}
public double chu(double a,double b)
{
return a/b;
}

private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
{

}

private void textBox1_TextChanged(object sender, System.EventArgs e)
{

}

private void button1_Click(object sender, System.EventArgs e)
{
string i=this.comboBox1.SelectedItem.ToString();

switch(i)
{

case "+":this.textBox3.Text=this.jia(double.Parse(this.textBox1.Text),double.Parse(this.textBox2.Text)).ToString();

break;

case "-":this.textBox3.Text=this.jian(double.Parse(this.textBox1.Text),double.Parse(this.textBox2.Text)).ToString();
break;
case "*":this.textBox3.Text=this.cheng(double.Parse(this.textBox1.Text),double.Parse(this.textBox2.Text)).ToString();
break;
case"/" :this.textBox3.Text=this.chu(double.Parse(this.textBox1.Text),double.Parse(this.textBox2.Text)).ToString();
break;
}

}

private void button2_Click(object sender, System.EventArgs e)
{
this.textBox1.Text=null;
this.textBox2.Text=null;
this.textBox3.Text = null;
}

private void button3_Click(object sender, EventArgs e)
{

//this.Hide();
Application.Exit();
//this.Close();

}
}
}

网友（2）：

/// 只能输入数字（含负号小数点）
///

///
///
public static void OnlyEnterNumber(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8 && e.KeyChar != 13 && e.KeyChar != 45 && e.KeyChar != 46)
{
e.Handled = true;
}

// 输入为负号时，只能输入一次且只能输入一次
if (e.KeyChar == 45 && (((TextBox)sender).SelectionStart != 0 || ((TextBox)sender).Text.IndexOf("-") >= 0)) e.Handled = true;
if (e.KeyChar == 46 && ((TextBox)sender).Text.IndexOf(".") >= 0) e.Handled = true;
}

/*
* 参数：d表示要四舍五入的数；i表示要保留的小数点后位数。
* 正负数都四舍五入，适合数据统计的显示
*/
double Round(double d, int i)
{
if (d >= 0)
{
d += 5 * Math.Pow(10, -(i + 1));
}
else
{
d += -5 * Math.Pow(10, -(i + 1));
}
string str = d.ToString();
string[] strs = str.Split('.');
int idot = str.IndexOf('.');
string prestr = strs[0];
string poststr = strs[1];
if (poststr.Length > i)
{
poststr = str.Substring(idot + 1, i);
}
string strd = prestr + "." + poststr;
d = Double.Parse(strd);
return d;
}

private void txtInshu2_TextChanged(object sender, EventArgs e)
{

}

private void txtInshu2_KeyPress_1(object sender, KeyPressEventArgs e)
{
OnlyEnterNumber(sender, e);
}

private void btnJisuan_Click(object sender, EventArgs e)
{
if (txtInshu1.Text == "") {
MessageBox.Show("因数1不能为空！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
if (txtInshu2.Text == "")
{
MessageBox.Show("因数2不能为空！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}

double inshu1 = Convert.ToDouble(txtInshu1.Text);
double inshu2 = Convert.ToDouble(txtInshu2.Text);
double result = 0.0;

if (radioBtnJia.Checked) {
result = inshu1 + inshu2;
}

if (radioBtnJian.Checked)
{
result = inshu1 - inshu2;
}

if (radioBtnCheng.Checked)
{
result = inshu1 * inshu2;
}

if (radioBtnChu.Checked)
{
if (0 == inshu2)
{
MessageBox.Show("因数2做除数不能为0！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
result = inshu1 / inshu2;
result = Round(result, 6);
}

txtResult.Text = Convert.ToString(result);
}
}
}

网友（3）：

我有这个程序，如果需要，请继续追问，并留下你的邮箱号码。满意后请采纳，万分感谢~~~！

网友（4）：

你可以把联系我或者留下你的邮箱我把做好的程序和代码都可以发给你

网友（5）：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace _604010013_3计算器
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} private void button1_Click(object sender, EventArgs e)
{
string kh = txtbds.Text; string fh = ""; string ths = "";
string[] sz = kh.Split(new char[] { '+', '-','*','/' });
for (int i = 0; i < kh.Length; i++)
{ if ((kh[i] == '*') || (kh[i] == '/') || (kh[i] == '+') || (kh[i] == '-')) fh += kh[i];
}
int kjs = 0;
for (int i = 0; i < fh.Length; i++)
{
if (fh[i] == '*')
{
kjs = int.Parse(sz[i]) * int.Parse(sz[i + 1]);
ths = sz[i] + "*" + sz[i + 1];
kh = kh.Replace(ths, kjs.ToString());
}
if (fh[i] == '/')
{
kjs = int.Parse(sz[i]) / int.Parse(sz[i + 1]);
ths = sz[i] + "/" + sz[i + 1];
kh = kh.Replace(ths, kjs.ToString()); if (fh[i] == '+')
{
kjs = int.Parse(sz[i]) + int.Parse(sz[i + 1]);
ths = sz[i] + "+" + sz[i + 1];
kh = kh.Replace(ths, kjs.ToString());
}
if (fh[i] == '-')
{
kjs = int.Parse(sz[i]) - int.Parse(sz[i + 1]);
ths = sz[i] + "-" + sz[i + 1];
kh = kh.Replace(ths, kjs.ToString());
}
} string jzfh = ""; int jxls = 0;
string[] jzsz = kh.Split(new char[] { '+', '-','*','/' });
for (int k = 0; k < kh.Length; k++)
{ if ((kh[k] == '+') || (kh[k] == '-') || (kh[k] == '*') || (kh[k] == '/'))jzfh += kh[k]; }
if (jzfh.Length!= 0)
{
for (int k = 0; k < jzfh.Length; k++)
{
if (jzfh[k] == '*') { jxls = int.Parse(jzsz[k]) * int.Parse(jzsz[k + 1]); }
if (jzfh[k] == '/') { jxls = int.Parse(jzsz[k]) / int.Parse(jzsz[k + 1]); }
if (jzfh[k] == '+') { jxls = int.Parse(jzsz[k]) + int.Parse(jzsz[k + 1]); }
if (jzfh[k] == '-') { jxls = int.Parse(jzsz[k]) - int.Parse(jzsz[k + 1]); }
} txtjg.Text = jxls.ToString(); }
else { txtjg.Text = kh; }
}
} private void Form1_Load(object sender, EventArgs e)
{ }
}
}

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