compare two functions in a class c++
class Date
{
public:
Date(); // Constructor without parameters
Date(int m, int d, int y); // Constructor with parameters.
// accessors
int GetMonth(); // returns the size of the diamond
int GetDay();
int GetYear();
// mutators
bool Set(int m, int d, int y);
bool SetFormat(char f);
// standard input and output routines
void Input();
void Show();
void Increment(int numDays = 1);
int Compare(const Date& d);
private:
int month, // month variables
day, // day variable
year; // year variable
char format;
};