Function overloading/declare function, overloadingdeclare

Function overloading/declare function, overloadingdeclare

• Declare a function

To declare a function without identifying the argument list, you can do it in this way:

Void say hello (...);

Here, you use three point (...) to indicate that the function have no argument.

 

• Function overloading

Keep in mind that the signature, not the function type, enables function overloading. For example, the following two declaration are incompatible:

Long gronk (int n, float m); #1 // same signature

Double gronk (int n, float m); #2 // hence not allowed

Why, for example, if this is possible:

Int El = 0;

Float haa = 3;

Gronk (El, haa); // which function to use, #1 or #2, it is conflict.

Therefore, C ++ doesn't allow you to overload gronk () in this fashion. You can have different return type, but only if the signature are also different, for example:

Long gronk (int n, float m );

Double gronk (double n, double m); // now it is allowed