C#实现计算器功能 C#实现计算器功能

【C#实现计算器功能】本文实例为大家分享了C#实现计算器功能的具体代码，供大家参考，具体内容如下
在刚刚接触c#的时候，就想做一个简单加减乘除计算器。这就是目标，可惜一直没有动手去做，今天特意把它简单做了。很简单，很简单，了却一个心愿了。代码：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace MyPictureDownloader{//http://blog.sina.com.cn/s/blog_60d576800100tf5z.html//http://jingyan.baidu.com/article/380abd0a6b80701d90192cde.htmlpublic partial class JiSuanQi : Form{public JiSuanQi(){InitializeComponent(); initButton(); }public delegate double Operater(double num1, double num2); public void initButton(){var p = new Point(20, 80); Button[] listbtn =new Button[9]; for (int i = 0; i < 9; i++) {listbtn[i] = new Button(); listbtn[i].Name = "btn" + (i + 1).ToString(); listbtn[i].Text = (i+1).ToString(); listbtn[i].SetBounds(p.X, p.Y, 50, 50); listbtn[i].Click+= new System.EventHandler(ClickHandler); this.Controls.Add(listbtn[i]); p.X += 80; if (p.X >= this.Width - 80){p.X =20; p.Y += 60; }}}public void ClickHandler(Object sender, System.EventArgs e){Button btn = (Button)sender; string temp=txtnum.Text.ToString()+btn.Text; //这样解决了重复点击赋值问题txtnum.Text = temp; }private void btnzero_Click(object sender, EventArgs e){string temp = txtnum.Text.ToString() + btnzero.Text; //这样解决了重复点击赋值问题txtnum.Text = temp; }public double jisuan(string caozuofu, Operater fanga){double num2 = double.Parse(txtnum.Text); double jieguo = 0; //switch(caozuofu){//case"+"://jieguo = fanga(tempnum, num2); //break; //case "-"://jieguo = fanga(tempnum, num2); //break; //case "*"://jieguo = fanga(tempnum, num2); //break; //case "/"://jieguo = fanga(tempnum, num2); //break; //}jieguo = fanga(tempnum, num2); return jieguo; }public double add(double num1, double num2) {return num1 + num2; }public double jian(double num1, double num2){return num1- num2; }public double cheng(double num1, double num2){return num1 * num2; }public double chu(double num1, double num2){double result = 0; if (num2!=0){result= num1 / num2; }return result; }public double tempnum = 0; public string caozuofu = ""; public event Operater fangfa; private void btnresult_Click(object sender, EventArgs e){txtnum.Text = jisuan(caozuofu, fangfa).ToString(); }private void btnadd_Click(object sender, EventArgs e){tempnum = double.Parse(txtnum.Text); caozuofu = btnadd.Text; txtnum.Text = ""; fangfa = add; }private void btnde_Click(object sender, EventArgs e){tempnum = double.Parse(txtnum.Text); caozuofu = btnde.Text; txtnum.Text = ""; fangfa = jian; }private void btncheng_Click(object sender, EventArgs e){tempnum = double.Parse(txtnum.Text); caozuofu = btncheng.Text; txtnum.Text = ""; fangfa = cheng; }private void btnchu_Click(object sender, EventArgs e){tempnum = double.Parse(txtnum.Text); caozuofu = btnchu.Text; txtnum.Text = ""; fangfa = chu; }private void btndian_Click(object sender, EventArgs e){if (txtnum.Text.ToString()=="") {txtnum.Text = "0"; }string temp=""; if (txtnum.Text.ToString().IndexOf(".") > 0)//解决只能包含一个小数点{temp = txtnum.Text.ToString(); }else {temp = txtnum.Text.ToString() + btndian.Text; //这样解决了重复点击赋值问题}txtnum.Text = temp; }}}

初始界面：