Const inline function

Const constants
1, the Declaration of initialization, after which can no longer be changed const int i;
2. Pointer constants and constant pointers:
const INT * p; What p means cannot be changed.
int * Const;p address cannot be changed
Discriminant: With * as the dividing line, const on the left the data is constant, const on the right, the pointer is constant
3, the parameter is constant: void f (const int p); p cannot be changed
For example: void f (const int p) {
int & m=p;
m++;//error, M is a p reference, and p represents the same data and cannot be changed
}
4. The return value is constant: const int F (), at which point the return value cannot be modified as a left value.
F () =6;//. Error, return constant, cannot be modified
5. The const pointer cannot be assigned to a very measure pointer to prevent modification.
6. Constant Objects const X obi; constant objects can only access constant member methods.
7, constant function void f () const; The function cannot modify members in a class unless you use the mutable modifier. For 6 of the situation can have obj.f ();