C # operator overloading

namespace chapter11{public   class AddClass1   {public       int val;       public static ADDCLASS3 operator + (AddClass1 OP1, AddClass2 op2)       {           AddClass3 returnval = new AddClass3 ();           Returnval.val = Op1.val + op2.val;           return returnval;       }   }    public class AddClass2    {public        int val;       public static ADDCLASS3 operator + (AddClass1 OP1, AddClass2 OP2)//Note Do not add the same operator to more than one class because it is not clear which operator to use       //{       //     ADDCLASS3 returnval = new AddClass3 ();     returnval.val = Op1.val + op2.val;     return returnval;       }    } public    class ADDCLASS3    {public        int val;    }    Class program    {        static void Main (string[] args)        {            AddClass1 OP1 = new AddClass1 ();            Op1.val = 5;            AddClass2 OP2 = new AddClass2 ();            Op2.val = 5;            ADDCLASS3 op3 = Op1 + Op2;}}}    

operator overloading in mixed mode:namespacechapter11{ Public classAddClass1 { Public intVal;  Public StaticAddClass3operator+(AddClass1 OP1, AddClass2 op2) {ADDCLASS3 returnval=NewADDCLASS3 (); Returnval.val= Op1.val +Op2.val; returnReturnVal; }   }     Public classAddClass2 { Public intVal; //Public static ADDCLASS3 operator + (AddClass1 OP1, AddClass2 op2)//be careful not to add the same operator to more than one class because it is not clear which operator to use// {       //ADDCLASS3 returnval = new ADDCLASS3 (); //returnval.val = Op1.val + op2.val; //return returnval; //}    }     Public classADDCLASS3 { Public intVal; }    classProgram {Static voidMain (string[] args) {AddClass1 OP1=NewAddClass1 (); Op1.val=5; AddClass2 OP2=NewAddClass2 (); Op2.val=5; ADDCLASS3 OP3= Op1 +OP2; }    }}

View Code

When using a mixed type, the operands must be in the same order as the operator overloads, unless another overloaded operator and an inverted parameter are provided;

Overloaded operators: operator type members added to a class must be static.

Such as:

1  Public classAddClass12 {3       Public intVal; 4       Public StaticAddClass1operator+(AddClass1 OP1, AddClass1 op2)5     {6AddClass1 ReturnVal =NewAddClass1 ();7Returnval.val = Op1.val +Op2.val;8            returnReturnVal; 9     }Ten}

Operators that can be overloaded:

Unary operators: +,-,!, ~,++,--, true,false

Binary operators: +,-, *,%,&,/,|,^,<<,>>

Comparison operator: ==,!=,<,>,<=,>=

If the true and false operators are overloaded, you can use a class in a Boolean expression, for example (if (OP1) {}).

C # operator overloading