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  1. //Natalie Zarate                   CIS5                     Chapter 3 P. 146 #17
  2.  
  3. /*******************************************************************************
  4.  * 
  5.  * COMPUTE EARNED INTEREST
  6.  * _____________________________________________________________________________
  7.  * This program will accept as input the monthly interest rate, the loan amount, 
  8.  * and the number of payments made toward the loan, then computes the monthly 
  9.  * payment, how much of the loan was paid off and the amount of interest paid.
  10.  * 
  11.  * Computation is based on the formula
  12.  * 
  13.  * payment = ((rate * (1 + rate)^N) / ((1 + rate)^(N) - 1)) * L
  14.  * 
  15.  * where rate is the monthly interest rate, N is the number of payments, and L 
  16.  * is the original loan 
  17.  * _____________________________________________________________________________
  18.  * INPUT
  19.  *   rate     : Monthly interest rate
  20.  *   ogLoan   : The initial loan amount
  21.  *   numPay   : Number of payments made on the loan
  22.  * 
  23.  * OUTPUT
  24.  *   monPay   : Monthly payment
  25.  *   loanPaid : Amount paid back
  26.  *   intrestP : Amount paid in interest
  27.  * 
  28.  * ****************************************************************************/
  29. #include <iostream>
  30. #include <iomanip>
  31. #include <cmath>
  32. using namespace std;
  33.  
  34. int main() 
  35. {
  36.     float rate;              // INPUT - Monthly interest rate
  37.     float ogLoan;            // INPUT - The initial loan amount
  38.     float numPay;            // INPUT - Number of payments made on the loan
  39.     float monPay;            // OUTPUT - Monthly payment
  40.     float loanPaid;          // OUTPUT - Amount of the loan paid off
  41.     float interestP;         // Output - Amount paid in interest
  42.  
  43. //  Promt user for loan amount and display
  44.     cout << left << setw(25) << "Loan Amount:";
  45.     cin >> ogLoan;
  46.     cout << right << "$ " << setprecision(2) << fixed << ogLoan; 
  47.  
  48. //  Prompt user for monthly interest rate and display
  49.     cout << "\n" << left << setw(25) << "Monthly Interest Rate:";
  50.     cin >> rate;
  51.     cout << right << setw(9) << setprecision(0) << rate << "%" << endl;
  52.  
  53. //  Prompt user for number of payments and display
  54.     cout << left << setw(25) << "Number of Payments:";
  55.     cin >> numPay; 
  56.     cout << right << setw(10) << setprecision(0) << numPay << endl;
  57.  
  58. //  Compute monthly payment
  59.     cout << setprecision(2) << fixed;
  60.     rate = 0.01;
  61.     monPay = 1 + rate;
  62.     monPay = rate * pow(monPay, numPay);
  63.     monPay = monPay / (pow((rate + 1) , numPay) - 1);
  64.     monPay = monPay * ogLoan;
  65.  
  66. //  Display monthly payment
  67.     cout << left << setw(25) << "Monthly Payment:";
  68.     cout << right << "$" << setw(9) << monPay << endl;
  69.  
  70. //  Compute amount paid back and display
  71.     loanPaid = monPay * numPay;
  72.     cout << left << setw(25) << "Amount Paid Back:";
  73.     cout << right << "$" << setw(9) << loanPaid << endl;
  74.  
  75. //  Compute interest paid and display
  76.     interestP = loanPaid - ogLoan;
  77.     cout << left << setw(25) << "Interest Paid:";
  78.     cout << right << "$" << setw (9) << interestP << endl;
  79.  
  80. 	return 0;
  81. }
Success #stdin #stdout 0.01s 5284KB
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stdin
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10000.00
1
36
stdout
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Loan Amount:             $ 10000.00
Monthly Interest Rate:           1%
Number of Payments:              36
Monthly Payment:         $   332.14
Amount Paid Back:        $ 11957.16
Interest Paid:           $  1957.16
https://ideone.com/7x8H62
Ch3 #17
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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