C# 在vs中写的简单计算器 winform应用程序

• 界面
• 源代码
• 资源下载

界面

这个程序十分简单，我觉得比较重要的设计思路就是双目和单目运算符的不同算法，双目运算符要记录两个数字，而单目运算符记录一个数字，并且两者算法都在点击下一个运算符的时候，使用上一次运算符进行计算得出结果。其次的问题就是一些细节和一些特殊情况下可能会出的bug。

源代码

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace Calculator{public partial class Form1 : Form{bool isAppend; //控制数字输入string preOper = null; //前一位运算符double result; //运算结果bool Useequal = false; //判断等号是否使用bool Usedot = false; //判断小数点是否使用bool UseNegative = false; //判断负数符号是否使用//textbox1为输入框//textbox2为运算式显示框public Form1() //主窗体{InitializeComponent();}private void NumClicked(object sender, EventArgs e) //数字按钮click函数{string num = ((Button)sender).Text;Textdisplay(num);NumInput(num);}private void Textdisplay(string num)   //第一行的运算式的显示函数{this.textBox2.Text += num;}private void NumInput(string num)   //数字输入{if (Useequal == true){this.textBox2.Text = num;Useequal = false;}if (isAppend){this.textBox1.Text += num;}else{this.textBox1.Text = num;}isAppend = true;this.textBox1.Focus();this.textBox1.SelectionStart = this.textBox1.Text.Length;}private void DoubleClicked(object sender, EventArgs e)  //双目运算符click函数{string curOper = ((Button)sender).Text;if(this.textBox2.Text.Last()==\'+\'|| this.textBox2.Text.Last() == \'-\' ||this.textBox2.Text.Last() == \'*\' || this.textBox2.Text.Last() == \'/\' ){this.textBox2.Text = this.textBox2.Text.Remove(this.textBox2.Text.Length - 1, 1)+curOper;preOper = curOper;}else{Textdisplay(curOper);DoubleOperInput(curOper);}this.textBox1.Focus();}private void DoubleOperInput(string curOper)     //双目运算符输入{if (Useequal == true)Useequal = false;if (preOper == null){preOper = curOper;this.result = double.Parse(this.textBox1.Text);}else{double curNum = double.Parse(this.textBox1.Text);switch (preOper){case \"+\": this.result += curNum; break;case \"-\": this.result -= curNum; break;case \"*\": this.result *= curNum; break;case \"/\": this.result /= curNum; break;}this.textBox1.Text = result.ToString();preOper = curOper;}isAppend = false;Usedot = false;UseNegative = false;}private void SingleClick(object sender, EventArgs e)   ////单目运算符click函数{if (Useequal == true)Useequal = false;double curNum = double.Parse(this.textBox1.Text);string curOper = ((Button)sender).Text;Textdisplay(curOper);switch (curOper){case \"sqrt\": curNum=Math.Sqrt(curNum); break;case \"1/x\": curNum=1/curNum; break;case \"x^2\": curNum=curNum*curNum; break;case \"sin\": curNum = Math.Sin(Math.PI * (curNum / 180)); break;}this.textBox1.Text = curNum.ToString();Usedot = false;UseNegative = false;isAppend = false;this.textBox1.Focus();this.textBox1.SelectionStart = this.textBox1.Text.Length;}private void DotClick(object sender, EventArgs e)    //小数点click函数{string curOper = ((Button)sender).Text;DotInput(curOper);}private void DotInput(string curOper)       //小数点输入{if (Usedot == false){if (Useequal == true){this.textBox2.Text = \"0\" + curOper;this.textBox1.Text = \"0\" + curOper;Useequal = false;isAppend = true;}else if (this.textBox1.Text == \"\"){this.textBox2.Text = \"0\" + curOper;this.textBox1.Text = \"0\" + curOper;isAppend = true;}else if (!char.IsDigit(this.textBox2.Text.Last())){this.textBox2.Text += \"0\" + curOper;this.textBox1.Text = \"0\" + curOper;isAppend = true;}else{this.textBox1.Text += curOper;this.textBox2.Text += curOper;}Usedot = true;}this.textBox1.Focus();}private void EqualClick(object sender, EventArgs e)   //等于按钮click函数{DoubleClicked(btnEquals,null);this.textBox2.Text =result.ToString();preOper = null;Useequal = true;Usedot = false;UseNegative = false;this.textBox1.Focus();}private void BackClick(object sender, EventArgs e)   //退格click函数{if (isAppend&& this.textBox1.Text!=\"\"){this.textBox1.Text = this.textBox1.Text.Remove(this.textBox1.Text.Length-1,1);this.textBox2.Text = this.textBox2.Text.Remove(this.textBox2.Text.Length - 1, 1);}this.textBox1.Focus();}private void ClearClick(object sender, EventArgs e)  //清除{this.textBox1.Text = \"\";this.textBox2.Text = \"\";preOper = null;Usedot = false;Useequal = false;UseNegative = false;this.textBox1.Focus();}private void textBox1_KeyPress(object sender, KeyPressEventArgs e)  //键盘输入{e.Handled = true;if (char.IsDigit(e.KeyChar)){Textdisplay(e.KeyChar.ToString());NumInput(e.KeyChar.ToString());}else if(e.KeyChar == \'.\'){DotInput(e.KeyChar.ToString());}else if (e.KeyChar == \'+\'||e.KeyChar == \'-\' || e.KeyChar == \'*\' || e.KeyChar == \'/\'){Textdisplay(e.KeyChar.ToString());DoubleOperInput(e.KeyChar.ToString());}else if(e.KeyChar== 8)  //退格符的ascii码为8{BackClick(null, null);}else if(e.KeyChar==13)  //等于符的ascii码为13{EqualClick(null, null);}this.textBox1.SelectionStart = this.textBox1.Text.Length;}private void Negative(object sender, EventArgs e)  //负数click函数{if (UseNegative == false){if (this.textBox1.Text == \"\"){this.textBox1.Text = \"-\";this.textBox2.Text = \"(-)\";isAppend = true;}else if (Useequal == true){this.textBox1.Text = \"-\";this.textBox2.Text = \"(-)\";Useequal = false;isAppend = true;}else if(!char.IsDigit(this.textBox2.Text.Last())){this.textBox2.Text += \"(-)\";this.textBox1.Text = \"-\";isAppend = true;}}UseNegative = true;}}}

资源下载

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