C# Win 计算器 麻烦看看问题出在哪里？

[u010687495]

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 WindowsFormsApplication5
{
public partial class Form1 : Form
{
double num1, num2, result;
bool decimalFlag=false;
string myOperator;

public Form1()
{
InitializeComponent();
}

private void textReadout_TextChanged(object sender, EventArgs e)
{
textReadout.Text = "0.";
textReadout.TextAlign = HorizontalAlignment.Right;
}



public void NumClick(int myNumber)
{
if (decimalFlag)
{
textReadout.Text = textReadout.Text + myNumber;
}
else
{
if (textReadout.Text == "0.")
{
textReadout.Text = myNumber + ".";

}
else
{
textReadout.Text = textReadout.Text.Substring
(0, textReadout.Text.Length + 1) + myNumber + ".";
}
}
}



private void button10_Click(object sender, EventArgs e)
{
NumClick(0);
}

private void button3_Click(object sender, EventArgs e)
{
NumClick(1);
}

private void button8_Click(object sender, EventArgs e)
{
NumClick(2);
}

private void button9_Click(object sender, EventArgs e)
{
NumClick(3);
}

private void button2_Click(object sender, EventArgs e)
{
NumClick(4);
}

private void button6_Click(object sender, EventArgs e)
{
NumClick(5);
}

private void button7_Click(object sender, EventArgs e)
{
NumClick(6);
}

private void button1_Click(object sender, EventArgs e)
{
NumClick(7);
}

private void button4_Click(object sender, EventArgs e)
{
NumClick(8);
}

private void button5_Click(object sender, EventArgs e)
{
NumClick(9);
}





private void button11_Click(object sender, EventArgs e)
{
decimalFlag = true;
}

private void but_C_Click(object sender, EventArgs e)
{
num1 = 0;
num2 = 0;
textReadout.Text="0.";
decimalFlag=false;
}

private void buttonAdd_Click(object sender, EventArgs e)
{
myOperator = "add";
num1 = double.Parse(textReadout.Text);
textReadout.Text = "0.";
decimalFlag = false;
}

private void buttonSub_Click(object sender, EventArgs e)
{
myOperator = "Sub";
num1 = double.Parse(textReadout.Text);
textReadout.Text = "0.";
decimalFlag = false;
}

private void buttonMul_Click(object sender, EventArgs e)
{
myOperator = "Mul";
num1 = double.Parse(textReadout.Text);
textReadout.Text = "0.";
decimalFlag = false;
}

private void buttonDiv_Click(object sender, EventArgs e)
{
myOperator = "Div";
num1 = double.Parse(textReadout.Text);
textReadout.Text = "0.";
decimalFlag = false;
}

private void button12_Click(object sender, EventArgs e)
{
num2 = double.Parse(textReadout.Text);
switch (myOperator)
{
case"add":
result = num1 + num2;
textReadout.Text = result.ToString();
break;
case "Sub":
result = num1 - num2;
textReadout.Text = result.ToString();
break;
case "Mul":
result = num1 * num2;
textReadout.Text = result.ToString();
break;
case "Div":
if (num2 == 0)
{
textReadout.Text = "除数不能为“0”！";
}
else
{
result = num1 / num2;
textReadout.Text = result.ToString();
}
break;
}
}

}
}

[lxx2011]

private void textReadout_TextChanged(object sender, EventArgs e)
{
//textReadout.Text = "0.";
textReadout.TextAlign = HorizontalAlignment.Right;
}

public void NumClick(int myNumber)
{
if (decimalFlag)
{
textReadout.Text = textReadout.Text + myNumber;
}
else
{
if (textReadout.Text == "0.")
{
textReadout.Text = myNumber + ".";

}
else
{
//textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length + 1) + myNumber + ".";
textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length - 1) + myNumber + ".";
}
}
}

[圣光麦造]

= =代码好多~

 //把0-9的数字按钮绑到一个方法上面~
         private void buttonNum_Click(object sender, EventArgs e)
         {
             var num = int.Parse((sender as Button).Text);
             NumClick(num);
         }

把计算方法单独的封装一个出来 给予参与指定运算~

[u010687495]

引用 5 楼 luxianxin 的回复:

private void textReadout_TextChanged(object sender, EventArgs e) { //textReadout.Text = "0."; textReadout.TextAlign = HorizontalAlignment.Right; } public void NumClick(int myNumber) { if (decimalFlag) { textReadout.Text = textReadout.Text + myNumber; } else { if (textReadout.Text == "0.") { textReadout.Text = myNumber + "."; } else { //textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length + 1) + myNumber + "."; textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length - 1) + myNumber + "."; } } }

您删了一段代码，加了两端注释。没看明白，何意？

[u010687495]

引用 6 楼 shengguang1587 的回复:

= =代码好多~

 //把0-9的数字按钮绑到一个方法上面~
         private void buttonNum_Click(object sender, EventArgs e)
         {
             var num = int.Parse((sender as Button).Text);
             NumClick(num);
         }

把计算方法单独的封装一个出来 给予参与指定运算~

我基本明白您的意思，可是我现在是现有代码不能运行，我觉得能运行了，才谈得上改进。

[E次奥]

计算器应该支持先输入算式在一次性计算。 例如：1*（2+3）-2*2+5；像这样的。。。

[caodongjie]

代码太长了 ，要下班了，帮你顶一下

[lxx2011]

private void textReadout_TextChanged(object sender, EventArgs e) { //textReadout.Text = "0."; textReadout.TextAlign = HorizontalAlignment.Right; } 当textReadout控件的text值发生改变时引发的事件，所以必须注释那一行，否则textReadout.Text永远显示“0.” textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length - 1) + myNumber + ".";中Substring(0, textReadout.Text.Length + 1)方法是获取字符串中比字符串长度少一个字符的字符串，例如“12.”则得到“12”；

[小生我怕怕]

private void textReadout_TextChanged(object sender, EventArgs e) { //textReadout.Text = "0."; textReadout.TextAlign = HorizontalAlignment.Right; } 当textReadout控件的text值发生改变时引发的事件，所以必须注释那一行，否则textReadout.Text永远显示“0.” textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length - 1) + myNumber + ".";中Substring(0, textReadout.Text.Length + 1)方法是获取字符串中比字符串长度少一个字符的字符串，例如“12.”则得到“12”；

[tudiy]

哪里出了问题？

[u010687495]

可运行 点数字键 会报错 另外 不理解 对小数点的解释 text初始界面 为空，如何让他为“0.”

[tudiy]

1.这个方法NumClick(int i)怎么写的？ 2.http://wenku.baidu.com/view/a40234db50e2524de5187e1b.html 3.FormLoad事件设置text.text=0

[u010687495]

public void NumClick(int myNumber) { if (decimalFlag) { textReadout.Text = textReadout.Text + myNumber; } else { if (textReadout.Text == "0.") { textReadout.Text = myNumber + "."; } else { textReadout.Text = textReadout.Text.Substring (0, textReadout.Text.Length + 1) + myNumber + "."; } } } 我copy的 不太能看懂 辛苦了 我初学

[u010687495]

引用 11 楼 luxianxin 的回复:

private void textReadout_TextChanged(object sender, EventArgs e) { //textReadout.Text = "0."; textReadout.TextAlign = HorizontalAlignment.Right; } 当textReadout控件的text值发生改变时引发的事件，所以必须注释那一行，否则textReadout.Text永远显示“0.” textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length - 1) + myNumber + ".";中Substring(0, textReadout.Text.Length + 1)方法是获取字符串中比字符串长度少一个字符的字符串，例如“12.”则得到“12”；

谢谢你，问题基本解决了，可是我想让text起始显示“0.”，怎么办呢？

[u010687495]

引用 11 楼 luxianxin 的回复:

private void textReadout_TextChanged(object sender, EventArgs e) { //textReadout.Text = "0."; textReadout.TextAlign = HorizontalAlignment.Right; } 当textReadout控件的text值发生改变时引发的事件，所以必须注释那一行，否则textReadout.Text永远显示“0.” textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length - 1) + myNumber + ".";中Substring(0, textReadout.Text.Length + 1)方法是获取字符串中比字符串长度少一个字符的字符串，例如“12.”则得到“12”；

现在问题是，每次调试时，都要先按C键，然后输入数字，否则就会报错。

[lxx2011]

引用 13 楼 u010687495 的回复:

[quote=引用 11 楼 luxianxin 的回复:] private void textReadout_TextChanged(object sender, EventArgs e) { //textReadout.Text = "0."; textReadout.TextAlign = HorizontalAlignment.Right; } 当textReadout控件的text值发生改变时引发的事件，所以必须注释那一行，否则textReadout.Text永远显示“0.” textReadout.Text = textReadout.Text.Substring(0, textReadout.Text.Length - 1) + myNumber + ".";中Substring(0, textReadout.Text.Length + 1)方法是获取字符串中比字符串长度少一个字符的字符串，例如“12.”则得到“12”；

谢谢你，问题基本解决了，可是我想让text起始显示“0.”，怎么办呢？[/quote] 直接将textReadout控件的Text属性改为“0.”就行了。。。