Add days to date without affecting the original input date

satekazumi (9)
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void Date::addDay()
{
    int DaysInMonth[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    string months [12] = {"jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec"};


    for(int i=0;i<12;i++)
    {
    if(mth == months[i])
    count = i;
    }
    bool flag;
    int theDays;
    cout<<"Enter how many days to be added"<<endl;
    cin>>theDays;"\n";

    if(isLeapYear())
    DaysInMonth[1] = 29;
    int tempDays = day;
    tempDays += theDays;

    do
    {
        flag = false;
        if(tempDays>DaysInMonth[count])
        {
            tempDays-=DaysInMonth[count];
            count++;
            flag = true;
        }
        if(count > 12)
        {
            count=1;
            year++;
        }
    }
    while(flag);
    day = tempDays;

    cout<<year<<"/"<<day<<"/";
    switch(count)
    {
        case 0 : cout<<"jan"<<endl;
                 break;
        case 1 : cout<<"feb"<<endl;
                 break;
        case 2 : cout<<"mar"<<endl;
                 break;
        case 3 : cout<<"apr"<<endl;
                 break;
        case 4 : cout<<"may"<<endl;
                 break;
        case 5 : cout<<"jun"<<endl;
                 break;
        case 6 : cout<<"jul"<<endl;
                 break;
        case 7 : cout<<"aug"<<endl;
                 break;
        case 8 : cout<<"sep"<<endl;
                 break;
        case 9 : cout<<"oct"<<endl;
                 break;
        case 10 : cout<<"nov"<<endl;
                 break;
        case 11 : cout<<"dec"<<endl;
                 break;
    }


}


void Date::returnDate() const
{
    cout<<"date is "<<day<<"-"<<mth<<"-"<<year<<endl;
}


When i input a date, it will do all sort of operations before going to returnDate() to print out.

I able to calculate the add days to date, but i dun wan it to affect the input date when i print out. What should i do?

when i enter example 20 jan 2008...then i add 20 days to it...the result is 9 feb 2008...but i wan when i prompt to print the date, it still contain 20 jan 2008
satekazumi (9)
anyone can assist me..give me some advice
Zaita (2770)
Create a date type. Or use a 3rd party date library.

http://www.boost.org/doc/libs/1_35_0/doc/html/date_time.html

:)
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