function Overloading/declare function

• Declare a function

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

void Say hello (...);

Here, your use of three point(...) to indicate that the function has no argument.

• function overloading

The Keep in mind is the signature, not the function type, enables function overloading. For example, the following and 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 the is possible:

int hel=0;

float haa=3;

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

Therefore, C + + doesn ' t allow the overload Gronk () in the This fashion. You can have different return type, but only if the signature is also different, for example:

Long Gronk (int n, float m);

Double Gronk (double N, double m); //now It is allowed

function Overloading/declare function