static void Main(string[] args)
{
while (true)
{
//获取需要运算的数字
Console.WriteLine("请输入第一个数字");
double numberA = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("请输入运算符");
string operate = Console.ReadLine();
Console.WriteLine("请输入第二个数字");
double numberB = Convert.ToDouble(Console.ReadLine());
//判断被除数是否为0
while (operate == "/" && numberB == 0)
{
Console.WriteLine("被除数不能为0，请重新输入");
numberB = Convert.ToDouble(Console.ReadLine());
}
//获取对应的工厂
Operation operation = OperationFactory.CreateOperation(operate);
operation.Number1 = numberA;
operation.Number2 = numberB;
double result = operation.GetResult();
Console.WriteLine("计算结果是:" + result);
Console.ReadKey();
}
}
static void Main(string[] args)
{
Operation oper = OperationFactory.CreateOperation("/");
oper.NumberA = 10;
oper.NumberB = 2;
double result = oper.GetResult();
}
static void Main(string[] args)
{
Operation oper;
oper = OperationFactory.CreateOperation(Console.ReadLine());
oper.NumberA = Convert.ToDouble(Console.ReadLine());
oper.NumberB = Convert.ToDouble(Console.ReadLine());
Console.Write(oper.GetResult());
Console.ReadLine();
}
static void Main(string[] args)
{
Operation oper = null;
oper = OperationFactory.createOperate("+");
oper.NumberA = 1;
oper.NumberB = 2;
double result = oper.GetResult();
Console.WriteLine(result);
Console.ReadLine();
}
static void Main(string[] args)
{
Operation op;
op = OperationFactory.CreateOperate("+");
op.NumberA = 1;
op.NumberB = 2;
Console.WriteLine(op.GetResult());
Console.WriteLine("__________________");
op = OperationFactory.CreateOperate("-");
op.NumberA = 5;
op.NumberB = 3;
Console.WriteLine(op.GetResult());
Console.ReadKey();
}
static void Main(string[] args)
{
#region 过程式
//Console.WriteLine("请输入数字A： ");
//string A = Console.ReadLine();
//Console.WriteLine("请选择运算符号（+、-、*、/）： ");
//string B = Console.ReadLine();
//Console.WriteLine("请输入数字B： ");
//string C = Console.ReadLine();
//string D = "";
//if (B == "+")
//{
// D = Convert.ToString(Convert.ToDouble(A) + Convert.ToDouble(C));
//}
//if (B == "-")
//{
// D = Convert.ToString(Convert.ToDouble(A) - Convert.ToDouble(C));
//}
//if (B == "*")
//{
// D = Convert.ToString(Convert.ToDouble(A) * Convert.ToDouble(C));
//}
//if (B == "/")
//{
// D = Convert.ToString(Convert.ToDouble(A) / Convert.ToDouble(C));
//}
//Console.WriteLine("结果是： " + D);
//Console.ReadKey();
#endregion
#region 修改后的过程式
//try
//{
// Console.WriteLine("请输入数字A： ");
// string strNumberA = Console.ReadLine();
// Console.WriteLine("请选择运算符号（+、-、*、/）： ");
// string strOperate = Console.ReadLine();
// Console.WriteLine("请输入数字B： ");
// string strNumberB = Console.ReadLine();
// string strResult = "";
// switch (strOperate)
// {
// case "+":
// strResult = Convert.ToString(Convert.ToDouble(strNumberA) + Convert.ToDouble(strNumberB));
// break;
// case "-":
// strResult = Convert.ToString(Convert.ToDouble(strNumberA) - Convert.ToDouble(strNumberB));
// break;
// case "*":
// strResult = Convert.ToString(Convert.ToDouble(strNumberA) * Convert.ToDouble(strNumberB));
// break;
// case "/":
// strResult = Convert.ToString(Convert.ToDouble(strNumberA) / Convert.ToDouble(strNumberB));
// break;
// default:
// break;
// }
// Console.WriteLine("结果是： " + strResult);
// Console.ReadKey();
//}
//catch (Exception ex)
//{
// Console.WriteLine("您的输入有错： " + ex.Message);
// throw;
//}
#endregion
#region 使用面向对象类
//try
//{
// Console.WriteLine("请输入数字A： ");
// string strNumberA = Console.ReadLine();
// Console.WriteLine("请选择运算符号（+、-、*、/）： ");
// string strOperate = Console.ReadLine();
// Console.WriteLine("请输入数字B： ");
// string strNumberB = Console.ReadLine();
// string strResult = "";
// strResult = Convert.ToString(Operate.GetResult(Convert.ToDouble(strNumberA), Convert.ToDouble(strNumberB), strOperate));
// Console.WriteLine("结果是： " + strResult);
// Console.ReadKey();
//}
//catch (Exception ex)
//{
// Console.WriteLine("您的输入有错： " + ex.Message);
// throw;
//}
#endregion
#region 使用松耦合类 + 简单工厂
try
{
Console.WriteLine("请输入数字A： ");
string strNumberA = Console.ReadLine();
Console.WriteLine("请选择运算符号（+、-、*、/）： ");
string strOperate = Console.ReadLine();
Console.WriteLine("请输入数字B： ");
string strNumberB = Console.ReadLine();
Operation oper;
oper = OperationFactory.createOperate(strOperate);
oper.NumberA = Convert.ToDouble(strNumberA);
oper.NumberB = Convert.ToDouble(strNumberB);
string result = Convert.ToString(oper.GetResult());
Console.WriteLine("结果是： " + result);
Console.ReadKey();
}
catch (Exception ex)
{
Console.WriteLine("您的输入有错： " + ex.Message);
Console.ReadKey();
}
#endregion
}