Subtraction of two dates

#include<iostream>
using namespace std;
class sub_date
{
private:
	int year;
	string month;
	bool status;
public:
	int day;
	sub_date();
	sub_date(string mnth, int dy, int yer);
	void setdata(string m, int d, int y);
	bool operator > (sub_date& obj);
	sub_date operator - (sub_date& obj);
};
sub_date::sub_date()
{
	month = " ";
	year = 0;
	day = 0;
}
sub_date::sub_date(string mnth, int dy, int yer)
{
	month = mnth;
	day = dy;
	year = yer;
}
void sub_date::setdata(string m, int d, int y)
{
	month = m;
	year = y;
	day = d;
}
bool sub_date::operator>(sub_date& obj)
{
	if (day > obj.day)
	{
		status = true;
	}
	else
	{
		status = false;
	}
	return status;
}
sub_date sub_date::operator-(sub_date& obj)
{
	sub_date temp;
	operator > (obj);
	if (status == true)
	{
		temp.day = day - obj.day;
	}
	else
	{
		temp.day = obj.day - day;
	}
	return temp;
}
int main()
{
	int day,year;
	string month;
	cout << "PLEASE! first enter MONTH then enter DAY and then YEAR" << endl;
	cout << "enter the first date : " << "\t";
	cin >> month;
	cin >> day >> year;

	sub_date date1(month, day, year);
	sub_date date2,date3;

	cout << "enter the second date : " << "\t";
	cin >> month;
	cin >> day >> year;

	date2.setdata(month, day, year);
	date3 = date1 - date2;
	cout << "AFTER SUBTRACTION OF TWO DATE " << endl;
	cout << month  <<" " << date3.day << " , " << year << endl;
}