标签：style blog io ar color sp on div log
运算类
public class operation
{
private double a = 0;
private double b = 0;
public double A
{
get { return a; }
set { a = value; }
}
public double B
{
get { return b; }
set { b = value; }
}
public virtual double GetResult()
{
double rst = 0;
return rst;
}
}
加减乘除类
public class Jia : operation
{
public override double GetResult()
{
double result = 0;
result = A + B;
return result;
}
}
public class Jian : operation
{
public override double GetResult()
{
double result = 0;
result = A - B;
return result;
}
}
public class Cheng : operation
{
public override double GetResult()
{
double result = 0;
result = A * B;
return result;
}
}
public class Chu : operation
{
public override double GetResult()
{
double result = 0;
if(B==0)
throw new Exception("除数不能为0");
result = A / B;
return result;
}
}
工厂类
public class OperationFactory
{
public static operation CreateOperation(string operation)
{
operation result = null;
switch (operation)
{
case "+": result = new Jia(); break;
case "-": result = new Jian(); break;
case "*": result = new Cheng(); break;
case "/": result = new Chu(); break;
default:
break;
}
return result;
}
}
控制台请求
Console.Write("请输入第一个数"); double a =Convert.ToDouble(Console.ReadLine()); Console.Write("请输入第二个数"); double b =Convert.ToDouble(Console.ReadLine()); Console.Write("请输入运算符"); string opr = Console.ReadLine(); operation opr2 = OperationFactory.CreateOperation(opr); opr2.A = a; opr2.B = b; double result = opr2.GetResult(); Console.WriteLine(result); Console.ReadLine();
标签：style blog io ar color sp on div log
原文地址：http://www.cnblogs.com/zxhome/p/4151512.html
