static void Main(string[] args)
{
Operation opera = new Operation();
opera = SimpleFactory.CreateOperation("+");
opera.NumberA = 5;
opera.NumberB = 6;
System.Console.Write(opera.NumberA + "+" + opera.NumberB + "=" + opera.getResult());
}
static void Main(string[] args)
{
/*
* 面向过程方式实现计算器
* 1、面向过程的编程
* 2、添加运算类型时，改动较大
* OCP 开放-封闭
*/
string opt = Console.ReadLine();
double a = double.Parse(Console.ReadLine());
double b = double.Parse(Console.ReadLine());
double res;
switch (opt)
{
case "+":
res = a + b;
break;
case "-":
res = a - b;
break;
}
/*
* 面向对象的思想，通过简单工厂实现的计算器
* 调用者角色，
*/
Operation addOp = SimpleFactory.CreateOperation("+");
if (null != addOp)
{
addOp.NumberA = double.Parse(Console.ReadLine());
addOp.NumberB = double.Parse(Console.ReadLine());
Console.WriteLine(addOp.GetResult());
}
}