关于类似WINDOWS平台的计算器垒加问题 关于类似WINDOWS平台的计算器垒加问题,请各位大虾指教!!!!!!小弟在此谢过了。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 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; } }http://topic.csdn.net/u/20090922/14/b244a32a-f2bd-4a22-9563-e107dbdb2abf.html C#控制台应用程序中实现密码输入*号显示 c# 生成的图片提高质量 数组定义问题 页面跳转问题 急! c#中Socket发送struct的问题 请问在哪里可以找到web.config,并对其编辑? 過來幫忙看看簡單問題/謝謝 关于C#编译器选项的问题 我感觉现在学习没有人交流学得很慢,所以想交流的人加我QQ? 如何利用C#程序创建生成SQL SERVER存储过程? 关于Direct3D的一些小问题 同一种类型居然无法强制转换
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;
}
}
http://topic.csdn.net/u/20090922/14/b244a32a-f2bd-4a22-9563-e107dbdb2abf.html