C＃语言，计算器 [英] C# language, Calculator
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问题描述
大家好，谢谢您的帮助。
Hello everyone and thanks for helping me.
我用C＃制作了这个计算器，但遇到了一个问题。
当我添加5 + 5 + 5之类的东西时，它会给我正确的结果，但是当我要减去两个以上的数字并除以或乘以两个以上的数字时，我不会得到正确的结果。
I made this calculator in C# and i got one problem. When i add something like 5+5+5 it gives me correct result but when i want to substract more than two number and also divide or multiply more than two number i don't get correct result.
您知道我在做什么吗
非常感谢！
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 calculator
{
public partial class Calculator : Form
{
public Calculator()
{
InitializeComponent();
}
private void btnOne_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnOne.Text;
//txtDisplay.Text = btnOne.Text;
}
private void btnTwo_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnTwo.Text;
}
private void btnThree_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnThree.Text;
}
private void btnFour_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnFour.Text;
}
private void btnFive_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnFive.Text;
}
private void btnSix_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnSix.Text;
}
private void btnSeven_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnSeven.Text;
}
private void btnEight_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnEight.Text;
}
private void btnNine_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnNine.Text;
}
private void btnZero_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + btnZero.Text;
}
private void btnClear_Click(object sender, EventArgs e)
{
txtDisplay.Clear();
}
private void btnPoint_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + ",";
}
double total1 = 0;
double total2 = 0;
bool plusButtonClicked = false;
bool minusButtonClicked = false;
bool divideButtonClicked = false;
bool multiplyButtonClicked = false;
private void btnPlus_Click(object sender, EventArgs e)
{
plusButtonClicked = true;
minusButtonClicked = false;
divideButtonClicked = false;
multiplyButtonClicked = false;
total1 = total1 + double.Parse(txtDisplay.Text);
txtDisplay.Clear();
}
private void btnMinus_Click(object sender, EventArgs e)
{
plusButtonClicked = false;
minusButtonClicked = true;
divideButtonClicked = false;
multiplyButtonClicked = false;
total1 = total1 + double.Parse(txtDisplay.Text);
txtDisplay.Clear();
}
private void btnDivide_Click(object sender, EventArgs e)
{
total1 = total1 + double.Parse(txtDisplay.Text);
txtDisplay.Clear();
plusButtonClicked = false;
minusButtonClicked = false;
divideButtonClicked = true;
multiplyButtonClicked = false;
}
private void btnMultiply_Click(object sender, EventArgs e)
{
total1 = total1 + double.Parse(txtDisplay.Text);
txtDisplay.Clear();
plusButtonClicked = false;
minusButtonClicked = false;
divideButtonClicked = false;
multiplyButtonClicked = true;
}
private void btnEquals_Click(object sender, EventArgs e)
{
if (plusButtonClicked == true)
{
total2 = total1 + double.Parse(txtDisplay.Text);
}
else if (minusButtonClicked == true)
{
total2 = total1 - double.Parse(txtDisplay.Text);
}
else if (divideButtonClicked == true)
{
total2 = total1 / double.Parse(txtDisplay.Text);
}
else if (multiplyButtonClicked == true)
{
total2 = total1 * double.Parse(txtDisplay.Text);
}
txtDisplay.Text = total2.ToString();
total1 = 0;
}
}
}
推荐答案
此代码尚未经过全面测试。为什么不尝试以下操作：
This code is has not been thoroughly tested. Why don't you try something like the following:
using System;
using System.Windows.Forms;
namespace Calculator
{
public enum Operator
{
None,
Add,
Minus,
Divide,
Multiply
}
public partial class Calculator : Form
{
private double total = 0;
private double currentValue = 0;
private Operator currentOperator;
public Calculator()
{
InitializeComponent();
}
private void btnOne_Click(object sender, EventArgs e)
{
ShowInput(btnOne.Text);
}
private void btnTwo_Click(object sender, EventArgs e)
{
ShowInput(btnTwo.Text);
}
private void btnThree_Click(object sender, EventArgs e)
{
ShowInput(btnThree.Text);
}
private void btnFour_Click(object sender, EventArgs e)
{
ShowInput(btnFour.Text);
}
private void btnFive_Click(object sender, EventArgs e)
{
ShowInput(btnFive.Text);
}
private void btnSix_Click(object sender, EventArgs e)
{
ShowInput(btnSix.Text);
}
private void btnSeven_Click(object sender, EventArgs e)
{
ShowInput(btnSeven.Text);
}
private void btnEight_Click(object sender, EventArgs e)
{
ShowInput(btnEight.Text);
}
private void btnNine_Click(object sender, EventArgs e)
{
ShowInput(btnNine.Text);
}
private void btnZero_Click(object sender, EventArgs e)
{
ShowInput(btnZero.Text);
}
private void btnClear_Click(object sender, EventArgs e)
{
currentOperator = Operator.None;
txtDisplay.Clear();
total = 0;
}
private void btnPoint_Click(object sender, EventArgs e)
{
txtDisplay.Text = txtDisplay.Text + '.';
}
private void btnPlus_Click(object sender, EventArgs e)
{
ApplyOperator(Operator.Add);
}
private void btnMinus_Click(object sender, EventArgs e)
{
ApplyOperator(Operator.Minus);
}
private void btnDivide_Click(object sender, EventArgs e)
{
ApplyOperator(Operator.Divide);
}
private void btnMultiply_Click(object sender, EventArgs e)
{
ApplyOperator(Operator.Multiply);
}
private void btnEquals_Click(object sender, EventArgs e)
{
Evaluate();
txtDisplay.Text = Convert.ToString(total);
}
private void Evaluate()
{
switch (currentOperator)
{
case Operator.Add:
total += currentValue;
break;
case Operator.Minus:
total -= currentValue;
break;
case Operator.Divide:
total /= currentValue;
break;
case Operator.Multiply:
total *= currentValue;
break;
case Operator.None:
break;
}
currentValue = 0;
currentOperator = Operator.None;
}
private void ApplyOperator(Operator op)
{
if (currentOperator != Operator.None)
{
Evaluate();
}
else
{
total = double.Parse(txtDisplay.Text);
}
txtDisplay.Clear();
currentOperator = op;
}
private void ShowInput(String n)
{
txtDisplay.Text = txtDisplay.Text + n;
currentValue = double.Parse(txtDisplay.Text);
}
}
}
我仍然建议您最终将产生某种形式的运算符解析器。看看此处，或者自己查看分流场算法。
I would still recommend that you would end up making some form of operator parser. Take a look here or look in to the 'Shunting Yard' algorithm yourself.
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