Why const is after that?
| GBStudio (6) | |||
| Hi I'm new to C++ and I'm confused on something: int GetNum () const; Why const is after that? What is the difference between the code above and the one below: int const GetNum (); Thanks for your help Kindest Regards GBStudio | |||
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| ropez (312) | |||
int const GetNum();This function returns a const integer.
int GetNum() const;The const after the function can only be used on member functions. These functions have an implicit hidden parameter, which is a pointer to the object:
int GetNum(/* Class *this */);If the function is followed by const, the this pointer is const:
int GetNum(/* const Class *this */);This means: * You can't change member variables in a function declared as const. * If an object is declared as const, you can only call functions that are declared const. * From a const member function, you can only call other member functions that are also const. | |||
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| GBStudio (6) | |||
| Thanks a lot :) | |||
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