C#：Windows窗体应用程序 计算器（二）
初代计算器：C#：Windows窗体应用程序计算器（一）
看了【C#】计算器这篇文章，结合初代计算器进行升级，二代计算器丑陋依旧，用数组装数字和运算符，实现了多数相加减乘除余
calculator.cs代码如下：
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;
using System.Text.RegularExpressions;
namespace Complex
{
public partial class Calculator : Form
{
private List<double> leftNumber = new List<double>(); //存用户输入的数字
private List<int> operatorStr = new List<int>(); //存用户输入的运算符，定义+为0，-为1，×为2，÷为3，%为4
private Boolean isDot; //判断小数点是否已输入过
private Boolean result_flag = false; //判断是否已按过=
private Boolean add_flag = false; //按下+
private Boolean minus_flag = false; //按下-
private Boolean multi_flag = false; //按下×
private Boolean div_flag = false; //按下÷
private Boolean mod_flag = false; //按下%
private Boolean operate_flag = false;//按下=确定是否响应
public Calculator()
{
InitializeComponent();
this.StartPosition = FormStartPosition.CenterScreen;
}
//按下+、-、*、/、%按钮
private void bntOperation_Click(object sender, EventArgs e)
{
isDot = false;
Button btn = (Button)sender;
if (btn.Equals(btnPlus))
{
if (!add_flag) //防止用户多次输入一个符号键，符号键只允许输入一次
{
result_flag = false;
leftNumber.Add(double.Parse(txtBResult.Text));//将当前已输入的数字放入leftNumber
operatorStr.Add(0);
label.Text += "+";
add_flag = true;
operate_flag = false; //刚输入完符号，不能构成一条正常的表达式，如11+，设置为不可运行状态
}
}
else if (btn.Equals(btnMinus))
{
if (!minus_flag)
{
result_flag = false;
leftNumber.Add(double.Parse(txtBResult.Text));
operatorStr.Add(1);
label.Text += "-";
minus_flag = true;
operate_flag = false;
}
}
else if (btn.Equals(btnMultioly))
{
if (!multi_flag)
{
result_flag = false;
leftNumber.Add(double.Parse(txtBResult.Text));
operatorStr.Add(2);
label.Text = "(" + label.Text + ")" + "×";//给前面的已经输入的东西加个括号。
multi_flag = true;
operate_flag = false;
}
}
else if (btn.Equals(btndivision))
{
if (!div_flag)
{
result_flag = false;
leftNumber.Add(double.Parse(txtBResult.Text));
operatorStr.Add(3);
label.Text = "(" + label.Text + ")" + "÷";
div_flag = true;
operate_flag = false;
}
}
else if (!mod_flag)
{
result_flag = false;
leftNumber.Add(double.Parse(txtBResult.Text));
operatorStr.Add(4);
label.Text = "(" + label.Text + ")" + "%";
mod_flag = true;
operate_flag = false;
}
}
//按下=按钮
private void bntEqual_Click(object sender, EventArgs e)
{
isDot = false;
if (leftNumber.Count > 0 && operatorStr.Count > 0 && operate_flag)
{
//需要防止用户没输入数字，或者只输入了一个数，就按=
leftNumber.Add(double.Parse(txtBResult.Text));
double total = leftNumber[0];
for (int i = 0; i < operatorStr.Count; i++)
{
int Operator = operatorStr[i];
switch (Operator)
{
case 0:
total += leftNumber[i + 1];
break;
case 1:
total -= leftNumber[i + 1];
break;
case 2:
total *= leftNumber[i + 1];
break;
case 3:
total /= leftNumber[i + 1];
break;
case 4:
total %= leftNumber[i + 1];
break;
}
}
txtBResult.Text = total.ToString();
label.Text = total.ToString();
operatorStr.Clear(); //清空数字和运算符数组
leftNumber.Clear();
result_flag = true; //表示按下=
}
}
//按下数字键
private void btn_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
if (btn.Equals(btn0))
num("0");
else if (btn.Equals(btn1))
num("1");
else if(btn.Equals(btn2))
num("2");
else if(btn.Equals(btn3))
num("3");
else if (btn.Equals(btn4))
num("4");
else if (btn.Equals(btn5))
num("5");
else if (btn.Equals(btn6))
num("6");
else if (btn.Equals(btn7))
num("7");
else if (btn.Equals(btn8))
num("8");
else if (btn.Equals(btn9))
num("9");
}
private void num(string num)
{
if (add_flag || minus_flag || multi_flag || div_flag || mod_flag || result_flag)
{
if (result_flag) //已按下=，刚算完一个运算的状态
{
label.Text = "";
}
txtBResult.Clear(); //刚输入一个运算符,要将txtBResult清空
add_flag = false;
minus_flag = false;
multi_flag = false;
div_flag = false;
mod_flag = false;
result_flag = false;
}
txtBResult.Text += num;
label.Text += num;
operate_flag = true;
}
//按下BackSpace按钮
private void bntBackSpace_Click(object sender, EventArgs e)
{
if (txtBResult.Text.Substring(0, txtBResult.TextLength - 1) == "")
txtBResult.Text = "0";
else
{
if (txtBResult.Text[txtBResult.TextLength - 1] == '.')
isDot = false;
txtBResult.Text = txtBResult.Text.Substring(0, txtBResult.TextLength - 1);
label.Text = label.Text.Substring(0, label.Text.Length - 1);
}
}
//按下Clear按钮
private void bntClear_Click(object sender, EventArgs e)
{
operatorStr.Clear();
leftNumber.Clear();
add_flag = false;
minus_flag = false;
multi_flag = false;
div_flag = false;
result_flag = false;
operate_flag = false;
txtBResult.Clear();
label.Text = "";
}
//按下小数点.按钮
private void bntDot_Click(object sender, EventArgs e)
{
if (isDot == false)
{
isDot = true;
txtBResult.Text += ".";
label.Text += ".";
}
}
}
}
项目下载链接：https://download.csdn.net/download/Cristiano272/12329735
另一个C# Winform程序
C#：Winform 打字测速程序 Typer：https://blog.csdn.net/Cristiano272/article/details/105598495