public static AddClass1 operator -(AddClass1 op1)
{
AddClass1 returnVal = new AddClass1();
returnVal.Val = -op1.Val;
return(returnVal);
}
//重载+
public static AddClass1 operator +(AddClass1 op1, AddClass1 op2)
{
AddClass1 returnVal = new AddClass1();
returnVal.Val = op1.Val + op2.Val;
return(returnVal);
}
static void Main(string[] args)
{
AddClass1 op1 = new AddClass1();
op1.Val = 1;
AddClass1 op2 = new AddClass1();
op2.Val = 2;
AddClass1 op3 = op1 + op2;
Console.WriteLine("op3.Var={0}", op3.Val);
AddClass2 op4 = new AddClass2();
op4.Val = 10;
AddClass3 op5 = op1 + op4;
Console.WriteLine("op5.Var={0}", op5.Val);
Console.ReadKey();
}