How do you ??????

This is a discussion on How do you ?????? within the C++ Programming forums, part of the General Programming Boards category; What I want to do is to insert a blank line every 6 lines in the print out, here is ...

  1. #1
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    How do you ??????

    What I want to do is to insert a blank line every 6 lines in the print out, here is what I have:

    // This program produces a loan amortization

    #include <iostream>
    #include <iomanip>
    #include <cmath>
    #include <fstream>
    using namespace std;

    int main()
    {

    ofstream outfile("A:Mort.txt");
    char name[31];
    float loan, rate, years, balance, term, payment;

    cout << "Enter the name of the mort. recipant. ";
    cin.getline(name, 31);
    cout << "Loan amount: $";
    cin >> loan;
    cout << "Annual Interest Rate: ";
    cin >> rate;
    cout << "Years of loan: ";
    cin >> years;

    term = pow((1 + rate / 12.0), 12.0 * years);
    payment = (loan * rate / 12.0 * term) / (term - 1.0);

    outfile.precision(2);
    outfile.setf(ios::fixed | ios::showpoint | ios::left);
    outfile << "The loan belongs to : " << name << endl;
    outfile << "Monthly payment: $" << payment << endl;

    outfile << endl;
    outfile << setw(10) << "Pay. No.";
    outfile << setw(10) << "Interest";
    outfile << setw(10) << "Principal";
    outfile << setw(10) << "Balance" << endl;
    outfile << "-------------------------------------\n";

    balance = loan;
    for (int month = 0; month < (12 * years); month++)
    {
    float minterest, principal;


    minterest = rate / 12 * balance;
    principal = payment - minterest;

    outfile << setw(10) << (month + 1);
    outfile << setw(10) << minterest;
    outfile << setw(10) << principal;
    outfile << setw(10) << balance << endl;

    balance -= principal;
    }


    outfile.close();
    return 0;

    }



    So I was thinking I would add :
    if ((month%6)==0)
    outfile << "Question how do you display a blank line?" ;
    For some reason I can't remember how to display a blank line


    TIA
    Bill

  2. #2
    Mayor of Awesometown Govtcheez's Avatar
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    I don't know much about fstreams, but wouldn't

    outfile<<endl<<endl

    do the trick?

  3. #3
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    This is where I put the if statement

    balance -= principal;
    }
    if ((month % 6) == 0)
    {
    outfile << endl<<endl;
    }
    That didn't seam to work but thanks anyway... Maybe I put it in the wrong place????

    Anybody else?????

    TIA
    Bill

  4. #4
    and the hat of wrongness Salem's Avatar
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    > Maybe I put it in the wrong place????
    I think you did

    balance -= principal;
    } <--- this is the closing brace of your for loop

    // which is odd, because isn't month now supposed to be out of scope?
    // in any event, it only happens once, when the for loop has finished.
    if ((month % 6) == 0)
    {
    outfile << endl<<endl;
    }
    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.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  5. #5
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    Thanks Salem I got that fixed, however when it printed to my out file it skipped the 1: here let me show you...

    1 44.67 72.81 6700.00

    2 44.18 73.29 6627.19
    3 43.69 73.78 6553.90
    4 43.20 74.27 6480.12
    5 42.71 74.77 6405.85
    6 42.21 75.27 6331.08
    7 41.71 75.77 6255.82

    8 41.20 76.27 6180.05
    9 40.69 76.78 6103.78
    10 40.18 77.29 6027.00
    11 39.66 77.81 5949.70
    12 39.15 78.33 5871.90
    13 38.62 78.85 5793.57 \

    See it didn't do right, it supposed to leave a blank line after the no. 6...How can I fix this???? Any suggestions????


    TIA
    Bill

  6. #6
    and the hat of wrongness Salem's Avatar
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    Month starts at 0 (in the for loop), so month % 6 will also be 0

    The test you need is
    if ( (month+1) % 6 ) == 0 )
    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.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  7. #7
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    Thanks Salem that did the trick....

    Thanks
    Bill

  8. #8
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    One last question.... How do I get the totals of principal and interest.... I want to display them every 36th line....

    TIA
    Bill

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