Date.h Example

#include <time.h>

class Date{
public:
    Date();
    Date(int);
    ~Date();

    void setDate(int);

    int getDay(){ return day; }
    int getMonth(){ return month; }
    int getYear(){ return year; }


private:
    int day, month, year;

};

//Date.cpp

Date::Date(){
    time_t now;
    time(&now); // Sets now to current time
    struct tm * timeinfo;
    timeinfo = localtime(&now);

    day = timeinfo->tm_mday;
    month = timeinfo->tm_mon;
    year = timeinfo->tm_year;
}

Date::Date(int dt){
    time_t elapsedtime = dt;
    struct tm * timeinfo;
    timeinfo = localtime(& elapsedtime);

    day = timeinfo->tm_mday;
    month = timeinfo->tm_mon;
    year = timeinfo->tm_year;
}

Date::~Date(){}

void Date::setDate(int dt){
    time_t elapsedtime = dt;
    struct tm * timeinfo;
    timeinfo = localtime(& elapsedtime);

    day = timeinfo->tm_mday;
    month = timeinfo->tm_mon;
    year = timeinfo->tm_year;
}