Multiple classes, output - c++

Question

i got a class for a date and a class for a point of time. Now i want to combine them. My problem is that i'm not able to get the output working, it always uses the initialized date.
Here is my code:
main.cpp
#include <iostream>
#include <iomanip>
#include "date.hpp"
#include "time.hpp"
using namespace std;
int main() {
Datum d1;
Datum d2(03, 12, 2015);
cout << "d1: " << d1 << endl;
cout << "d2: " << d2 << endl << endl;
zeit z1;
cout << "z1: " << z1 << endl;
zeit z2(d2, 23, 30);
cout << "z2: " << z2 << endl;
return 0;
}
date.cpp
#include "date.hpp"
#include <iostream>
Datum::Datum(unsigned int d, unsigned int m, unsigned int y)
{
day = d;
month = m;
year = y;
return;
}
Datum::Datum() : Datum(1, 1, 2000) { return; }
unsigned int Datum::getday() { return day; }
unsigned int Datum::getmonth() { return month; }
unsigned int Datum::getyear() { return year; }
std::ostream& operator<<(std::ostream& os, Datum& z)
{
os << z.getday() << ".";
os << z.getmonth() << ".";
os << z.getyear();
return os;
}
date.hpp
#ifndef DATUM_HPP_
#define DATUM_HPP_
#include <iostream>
class Datum {
private:
unsigned int day;
unsigned int month;
unsigned int year;
public:
Datum(unsigned int, unsigned int, unsigned int);
Datum();
unsigned int getday();
unsigned int getmonth();
unsigned int getyear();
friend std::ostream& operator<<(std::ostream&, Datum&);
};
#endif
time.cpp
#include "time.hpp"
#include <iostream>
zeit::zeit(Datum date, unsigned int h, unsigned int m)
{
std::cout << date.getday() << "." << date.getmonth() << "." << date.getyear() << std::endl;
min = m;
hour = h;
return;
}
zeit::zeit() : zeit(Datum(),0,0) { return; }
unsigned int zeit::getmin() { return min; }
unsigned int zeit::gethour() { return hour; }
std::ostream& operator<<(std::ostream& os, zeit& z)
{
os << z.date << ", ";
if (z.gethour() < 10)
os << "0" << z.gethour();
else
os << z.gethour();
os << ":";
if (z.getmin() < 10)
os << "0" << z.getmin();
else
os << z.getmin();
return os;
}
time.hpp
#ifndef ZEIT_HPP_
#define ZEIT_HPP_
#include "date.hpp"
class zeit {
private:
unsigned int min;
unsigned int hour;
Datum date;
public:
zeit(Datum, unsigned int, unsigned int);
zeit();
unsigned int getmin();
unsigned int gethour();
friend class Datum;
friend std::ostream& operator<<(std::ostream&, zeit&);
};
#endif
This is the output i get:
d1: 1.1.2000
d2: 3.12.2015
1.1.2000
z1: 1.1.2000, 00:00
3.12.2015
z2: 1.1.2000, 23:30
What am i doing wrong? Ty for any help!

Answer 1

You did not set the internal date of the zeit class, so it remains initialized with the default date when it gets called by the << operator. Add this line to the constructor of zeit in time.cpp:
this->date = date;