简单计算器

tengye19840704 2009-09-22 02:06:37

+-*/的计算器.C#写的
例如:1+2=3
我在"+"按钮里写如下代码
private void button13_Click(object sender, System.EventArgs e)
{
string strNo = "";
string strNo1= "";
strNo = this.textBox1.Text;//得到TEXTBOX中的值
strNo1 = strNo;
strSum = int.Parse(strNo1)+int.Parse(strNo);//两个值相加

}
应该怎么修改一下可以实现1+2=3
现在的情况是,只能加相同的值,因为都是从TEXTBOX中得到的值.
谢谢.

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Zhengjie322 2010-05-13

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我菜鸟一个请大家多指教

zhuifengguxin 2009-10-23

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我也在做

lsd123 2009-09-22

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ralhander 2009-09-22

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第二个函数a+=result

ralhander 2009-09-22

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最后那个函数为buttonEqual_Click

ralhander 2009-09-22

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想那么多干什么，一个textBox就一个呗，关键要你设两个类的变量



string a,b,c,result;//a为上一次显示的，b为这次显示的，c为运算符号

private void button1_Click(object sender, System.EventArgs e) 

{ 

    b+="1"；

     textBox1.Text=b;

    GetResult();

     

} 

//按照上面的复制2~0和.



private void buttonPlus_Click(object sender, System.EventArgs e)

{

    textBox1.Text=result;

    c="+";

    a="";

    a+=b;

    b="";

}

//按照上面的复制-~/



private GetResult()

{

  try

  {

    switch(c)

    {

        case"+":

            result=(Double.Parse(a)+Double.Parse(b)).ToString;

            break;

        case"-":

            result=(Double.Parse(a)-Double.Parse(b)).ToString;

            break;

        case"*":

            result=(Double.Parse(a)*Double.Parse(b)).ToString;

            break;

        case"/":

            result=(Double.Parse(a)/Double.Parse(b)).ToString;

            break;

        default:

            result=""+b;

    }

  }

  catch（DividedByZeroException e1)

  {

      Console.WriteLine("除数不能为0");

  }

  

}

private void buttonPlus_Click(object sender, System.EventArgs e)

{

    textBox1.Text=result;

}

cadtian 2009-09-22

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专家写的就是详细

wuyq11 2009-09-22

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使用堆栈stack保存
public class Operation
{
private double _numberA = 0;
private double _numberB = 0;
public double NumberA
{
get
{
return _numberA;
}
set
{
_numberA = value;
}
}
public double NumberB
{
get
{
return _numberB;
}
set
{
_numberB = value;
}
}
public virtual double GetResult()
{
double result = 0;
return result;
}
public static string checkNumberInput(string currentNumber, string inputString)
{
string result = "";
if (inputString == ".")
{
if (currentNumber.IndexOf(".") < 0)
{
if (currentNumber.Length == 0)
result = "0" + inputString;
else
result = currentNumber + inputString;
}
}
else if (currentNumber == "0")
{
result = inputString;
}
else
{
result = currentNumber + inputString;
}

return result;
}

}
class OperationAdd : Operation
{
public override double GetResult()
{
double result = 0;
result = NumberA + NumberB;
return result;
}
}
class OperationSub : Operation
{
public override double GetResult()
{
double result = 0;
result = NumberA - NumberB;
return result;
}
}
class OperationMul : Operation
{
public override double GetResult()
{
double result = 0;
result = NumberA * NumberB;
return result;
}
}
class OperationDiv : Operation
{
public override double GetResult()
{
double result = 0;
if (NumberB == 0)
throw new Exception("除数不能为0。");
result = NumberA / NumberB;
return result;
}
}
class OperationSqr : Operation
{
public override double GetResult()
{
double result = 0;
result = NumberB * NumberB;
return result;
}
}
class OperationSqrt : Operation
{
public override double GetResult()
{
double result = 0;
if (NumberB < 0)
throw new Exception("负数不能开平方根。");
result = Math.Sqrt(NumberB);
return result;
}
}
class OperationReverse : Operation
{
public override double GetResult()
{
double result = 0;
result = -NumberB;
return result;
}
}
public class OperationFactory
{
public static Operation createOperate(string operate)
{
Operation oper = null;
switch (operate)
{
case "+":
{
oper = new OperationAdd();
break;
}
case "-":
{
oper = new OperationSub();
break;
}
case "*":
{
oper = new OperationMul();
break;
}
case "/":
{
oper = new OperationDiv();
break;
}
case "sqr":
{
oper = new OperationSqr();
break;
}
case "sqrt":
{
oper = new OperationSqrt();
break;
}
case "+/-":
{
oper = new OperationReverse();
break;
}
}

return oper;
}

private void buttonAdd_Click(object sender, EventArgs e)
{
if (txtShow.Text != "")
{
oper = OperationFactory.createOperate(((Button)sender).Text);

oper.NumberA = Convert.ToDouble(txtShow.Text);

bOperate = true;
}
}
private void buttonEqual_Click(object sender, EventArgs e)
{
if (txtShow.Text != "")
{
if (((Button)sender).Text != "=")
{
oper = OperationFactory.createOperate(((Button)sender).Text);
}
oper.NumberB = Convert.ToDouble(txtShow.Text);
txtShow.Text = oper.GetResult().ToString();
bOperate = true;
}
}

cadtian 2009-09-22

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http://download.csdn.net/source/607633

i466834553 2009-09-22

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int total=0;
//加的事件
private void Add_Click(object sender, System.EventArgs e)
{
total+= int.Parse(textBox1.Text.Trim());
textBox1.Text = "";

}
//等的事件
private void Equals_Click(object sender, System.EventArgs e)
{
textBox1.Text = (aa + int.Parse(textBox1.Text.Trim())).ToString();
}

i466834553 2009-09-22

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cadtian 2009-09-22

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以前刚开始学的时候，我写了一个计算器，一个texbox的，能显示计算式子的，数字输入时用很多Button的，当时厚颜居然传上去了，你实在不行可以去bs下我的

后来看到《大话设计模式》中写的一个计算器，感叹自己写的实在太sb了

heping173 2009-09-22

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多定义一个变量不就可以了

cadtian 2009-09-22

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[Quote=引用 8 楼 tengye19840704 的回复:]
是..= 号是有的...
我就是把关键的相加写上来了,我把计算出的值定义成全局的了..在=号事件里给TEXTBOX赋值的.
[/Quote]

只有一个TEXTBOX，想进行计算，那计算的代码应该是在“=”代码里，这样的话，两个待处理的数字应该设为全局

huming_h 2009-09-22

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定义一个全局的string strNo = ""; 变量
在加号事件里
strNo = this.textBox1.Text;
this.textBox1.Text = "";
在等号事件里
int result = int.Parse(this.no1) + int.Parse(this.textBox1.Text);

cadtian 2009-09-22

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[Quote=引用 6 楼 tengye19840704 的回复:]
放多个是可以实现的.现在要求就放一个TEXTBOX,- -!唉..每次获得TEXTBOX的值,我开始想是,第一次获得的保存起来,跟第二次获得的相加.可是没成功.
[/Quote]

在"+"“=”按钮外面定义2个操作数啊

string strNo = "";
string strNo1= "";

加号代码里面写：strNo = this.textBox1.Text; 同时可以清空textBox1；
=号代码里面写strNo1 = this.textBox1.Text；

但是这样必须把操作符号+-*/传到等号代码里进行处理得出结果