int count = 1;
int result = 0;
List<int> al = new List<int>();
private void bujia_Click(object sender, EventArgs e)
{ al.Add(int.Parse(this.xianshi.Text));
this.xianshi.Text = null;
if (count % 2 == 0)
{ foreach (int num in al)
{
result += num;
}
this.xianshi.Text = result.ToString();
} count++;
}
那个地方有问题啊,累加的时候出错了
int result = 0;
List<int> al = new List<int>();
private void bujia_Click(object sender, EventArgs e)
{ al.Add(int.Parse(this.xianshi.Text));
this.xianshi.Text = null;
if (count % 2 == 0)
{ foreach (int num in al)
{
result += num;
}
this.xianshi.Text = result.ToString();
} count++;
}
那个地方有问题啊,累加的时候出错了
int count = 1;
int result = 0;
List <int> al = new List <int>();
private void bujia_Click(object sender, EventArgs e)
{
al.Add(int.Parse(this.xianshi.Text));
}
{
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/20100107/21/65aa1e7f-3298-4499-84bf-3bc907c905f5.html
public class Operation
{
private double _numberA = 0; //输入的第一个数
private double _numberB = 0; //输入的第二个数
public double NumberA
{
get
{
return _numberA;
}
set
{
_numberA = value;
}
}
public double NumberB
{
get
{
return _numberB;
}
set
{
_numberB = value;
}
}
public virtual double GetResult() //返回计算结果
{
double result = 0;
return result;
}
public static string checkNumberInput(string currentNumber, string inputString) //判断输入的数是否有小数点
{
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 //加法子类
{
public override double GetResult()
{
double result = 0;
result = NumberA + NumberB;
return result;
}
}
class OperationSub : Operation //减法子类
{
public override double GetResult()
{
double result = 0;
result = NumberA - NumberB;
return result;
}
}
class OperationMul : Operation //乘法子类
{
public override double GetResult()
{
double result = 0;
result = NumberA * NumberB;
return result;
}
}
class OperationDiv : Operation //除法子类
{
public override double GetResult()
{
double result = 0;
if (NumberB == 0) //当除数为0的时候将抛出异常
throw new Exception("除数不能为0。");
result = NumberA / NumberB;
return result;
}
}
class OperationSqr : Operation //自身的平方子类
{
public override double GetResult()
{
double result = 0;
result = NumberB * NumberB;
return result;
}
}
class OperationSqrt : Operation //平方根
{
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 //取反
{
public override double GetResult()
{
double result = 0;
result = -NumberB;
return result;
}
}
public class OperationFactory //计算器工厂类
{
public static Operation createOperate(string operate) //根据输入的运算符判断创建类型
{
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) //加号单击事件
{
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) //等号单击事件
{
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;
}
}
{
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;
}
}