nhap ngay class

#include <iostream>
#include <cstdio>
#include<iomanip>
using namespace std;

class Nhapday
{
public:
	Nhapday();
	void set_day(int=1 ,int=1 , int=1 );
	int get_day();

private:
	int day;
	int m;
	int y;

};
Nhapday::Nhapday() {

}
void Nhapday::set_day(int day,int m, int y) {
	if ((day > 0) && (day < 32)) {
		this->day = day;
	}
	if ((m > 0) && (m< 13)) {
		this->m = m;
	}
	if ((y > 0)) {
		this->y=y;
	}


}
int Nhapday::get_day() {
	cout <<setw(2) << setfill('0')<<day
		 << "/" << setw(2) << setfill('0') <<m
		 << "/" << setw(4) << setfill('0')<< y;
	return 0;
}



int main() {
	Nhapday d;

	d.set_day( 6, 3);
	d.get_day();



	system("pause");
}