Issue with division.

[Viraldude]

I am trying to create a program that calculates fraction of time remaining when a student leaves during the middle of the semester. I have to use function files here. I am having trouble with the division in function long double tuitionfrac(int, int, int).
No matter what numbers are entered, fractime gives an output of 0. I don't understand that.

 long double tuitionfrac(int opening, int leaving, int semend)
{
    int lefttime = semend - leaving;
    cout << "Left time " << lefttime << endl; //for error checking
    int tottime = semend - opening + 1;
    cout << "Total time " << tottime << endl;
    long double fractime = lefttime/tottime;
    cout << "fractional time " << fractime << endl; //always returns as 0.
    return fractime;
}

[Duthomhas]

Integers can't hold fractions.

int / int --> int.

You need to explicitly convert at least one of the operands to a double first:

long double fractime = (long double)lefttime / totime;

Hope this helps.

[Thumper]

lefftime and tottime are integers. When you divide them they're treated as such, and the division will get truncated to 0. You need to cast them to long doubles.

EDIT: Beat by Duoas

[Duthomhas]

That seems to happen an awful lot to me... I'll post a response and be beat by a minute or less by someone else.

[Viraldude]

Thank you. That worked!