C++:const Qualifier

Initialize:The Const object must be initialized once its value cannot be changed once it is created.

scope: The default const object is valid only within a file. Exception:extern const

constant Reference: the object that is bound cannot be modified by this reference.

int i=5; int &r1=i; Const int &r2=i;r1=1;    // correct, you can modify the value    of the bound object by reference r2=0;    // error, cannot modify the value of the bound object through a constant reference

Pointers and Const:

• *CONST constant Pointer : Defines the pointer itself as a constant
  • The invariant is the value of the pointer itself, not the value of the constant being pointed to.
• const* Pointer to constant:
• Const *const A constant pointer to a constant object:

C++:const Qualifier