Values not being received by functions - c++

Question

So I'm trying to make a program that takes some random number of entered seconds and converts it to Days, Hours, Minutes, and Seconds. I had to use symbolic constants to define the hours in a day, minutes in an hour, and seconds in a minute. I passed the value through but it's not being recieved so I end up with some huge negative number. Here's the code. If anyone can tell me where the problem lies I would be ever thankful.
I used the random bit of code in the function definitions code to oput total seconds to see if it was being recieved and it's not.
#ifndef SECONDS_H_
#define SECONDS_H_
#define HOURS_IN_DAY 24
#define MINUTES_IN_HOUR 60
#define SECONDS_IN_MINUTES 60
#include <iostream>
using namespace std;
class Seconds
{
private:
long totalSeconds;
public:
Seconds();
~Seconds(){};
Seconds(int totalSeconds);
void Seconds::convertSeconds(int &days, int &hours, int &minutes, int &seconds);
};
#endif
...
#include <conio.h>
#include <string>
#include <iostream>
#include "seconds.h"
#define HOURS_IN_DAY 24
#define MINUTES_IN_HOUR 60
#define SECONDS_IN_MINUTE 60
Seconds::Seconds(int totalSeconds)
{
totalSeconds = totalSeconds;
}
void Seconds::convertSeconds(int &days, int &hours, int &minutes, int &seconds)
{
cout << endl;
cout << "Total Seconds: " << totalSeconds;
cout << endl;
days = totalSeconds / MINUTES_IN_HOUR / SECONDS_IN_MINUTE / HOURS_IN_DAY;
hours = (totalSeconds / MINUTES_IN_HOUR / SECONDS_IN_MINUTE) % HOURS_IN_DAY;
minutes = (totalSeconds / MINUTES_IN_HOUR) % SECONDS_IN_MINUTE;
seconds = (totalSeconds % SECONDS_IN_MINUTE);
}
...
#include <iostream>
#include <conio.h>
#include <string>
#include "seconds.h"
#define HOURS_IN_DAY 24
#define MINUTES_IN_HOUR 60
#define SECONDS_IN_MINUTES 60
using namespace std;
int main ()
{
int totalSeconds;
int days = 0, hours = 0, minutes = 0, seconds = 0;
cout << "Enter a random massive amount of seconds: ";
cin >> totalSeconds;
Seconds sec(totalSeconds);
sec.convertSeconds(days, hours, minutes, seconds);
cout << "That is equivalent to " << days << " days, " << hours << " hours, " << minutes << " minutes, " << seconds << " seconds." << endl;
cout << "Press any key to continue...";
cin.sync();
_getch();
return 0;
}

Answer 1

This is a problem:
Seconds::Seconds(int totalSeconds)
{
totalSeconds = totalSeconds;
}
The function parameter totalSeconds shadows the class member, so this code is like doing x = x;, it has no effect on this->totalSeconds.
To fix this either use different variable name, or preferably use constructor initialization syntax:
Seconds::Seconds(long totalSeconds)
: totalSeconds(totalSeconds)
{
}
In this version, shadowing does not occur because the constructor initialization lists are smart.

Answer 2

Have you considered that the problem might be Integer Overflow?