2 FOR loops

This is a discussion on 2 FOR loops within the C++ Programming forums, part of the General Programming Boards category; Hello everyone, I am trying to calculate my arrivalscount and departurescount using a vector but my second loop isnt outputing ...

  1. #1
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    2 FOR loops

    Hello everyone,

    I am trying to calculate my arrivalscount and departurescount using a vector but my second loop isnt outputing any value. I think its because of my for loops......but I'm not sure. CAN I WRITE 2 FOR LOOPS TOGETHER?? Please advice>>>Thanks.
    This is what I wrote in my main:
    insert
    Code:
     
    Code:
    int main()
    {
        srand(time(NULL));
    
    
        Customers c;
        c.generateBookings();
        vector<Booking> a = c.getbooking();
    
    
        c.generateBookings(0, 0, 0, 0, 0);
        vector<Booking> b = c.getbooking();
    
    
    for(int i=0; i < 10;i++)
    {
    cout << "Booking number " << i << ":" << endl;
    cout << "booking: " << b[i].bookingTime << endl;
    cout << "arrival: "<<b[i].arrivalTime << endl;
    cout << "departure: "<<b[i].departureTime << endl;
    }
    
    
    int arrivalscount[10];
    int totalarrivals = 0;
    
    
    for(int i = 0; i < 10; i++)
    {
        arrivalscount[i] = 0;
        for(int j = 0; j < a.size() - 1; j++)
        {
            if(a[j].arrivalTime >= i && a[j].arrivalTime < i + 1)
            {
                arrivalscount[i] += 1;
                totalarrivals += 1;
            }
        }
    }
    
    for(int i = 0; i < 10; i++)
    {
        cout << "Interval [" << i << "," << i + 1 << ") arrivals: " << arrivalscount[i] << '\n';
    }
    cout << "Total arrivals = " << totalarrivals << '\n' ;
    
    
    
    //*************************************************
    int departurescount[10];
    int totaldepartures = 0;
    
    for (int i = 0; i < 10; i++)
    {
        departurescount[i] = 0;
        for (int k = 0; k = a.size() - 1; k++)
        {
            if(a[k].departureTime >= i && a[k].departureTime < i + 1)
            {
                departurescount[i] += 1;
                totaldepartures += 1;
            }
        }
    }
    
    for (int i = 0; i < 10; i++)
    {
        cout << "Interval [" << i << "," << i + 1 <<") departures: " << departurescount[i] << '\n';
    }
    cout << "Total departures = " << totaldepartures << '\n';
    
    Last edited by Daive; 12-13-2011 at 06:17 PM.

  2. #2
    and the hat of wrongness Salem's Avatar
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    There's certainly nothing wrong with writing loops within loops.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
    Algorithm Dissector iMalc's Avatar
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    Which "second loop" are you referring to?
    My homepage
    Advice: Take only as directed - If symptoms persist, please see your debugger

    Linus Torvalds: "But it clearly is the only right way. The fact that everybody else does it some other way only means that they are wrong"

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