Given the following definitions: const int x = 17; class A { public: A( ); A(int x); int f( ) const; int g(const A& x); private: int i; }; Each of the three const keywords is a promise to the...

Given the following definitions:

const int x = 17;

class A

{

public:

A( );

A(int x);

int f( ) const;

int g(const A& x);

private:

int i;

};

Each of the three const keywords is a promise to the compiler that the compiler will enforce. What is the promise in each case?