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  1. //Amari Mosley CSC5 Chapter 3, P. 143, #16 
  2. // 
  3. /************************************************************** 
  4.  * 
  5.  * Interest Earned 
  6.  * ____________________________________________________________
  7.  * This program calculates the interest earned on a savings 
  8.  * account over one year.
  9.  * Computation is based on the following formula:
  10.  * Amount = Principal * (1 + Rate / T)^T
  11.  * ____________________________________________________________
  12.  * INPUT 
  13.  * principal, rate, timesCompounded
  14.  * OUTPUT 
  15.  * interest, amount
  16.  * 
  17.  **************************************************************/ 
  18. #include <iostream> 
  19. #include <iomanip> 
  20. #include <cmath> 
  21. using namespace std; 
  22.  
  23. // Defining Main Function 
  24. int main() {
  25.     // Define variables
  26.     double principal, rate, amount, interest;
  27.     int timesCompounded;
  28.  
  29.     // Ask for the principal, interest rate, and times compounded
  30.     cout << "Enter the principal balance: ";
  31.     cin >> principal;
  32.  
  33.     cout << "Enter the interest rate (as a percentage, e.g., 4.25): ";
  34.     cin >> rate;
  35.  
  36.     cout << "Enter the number of times the interest is compounded during a year: ";
  37.     cin >> timesCompounded;
  38.  
  39.     // Calculate the amount and interest[cite: 6]
  40.     // The rate must be converted from a percentage to a decimal for the formula
  41.     double rateDecimal = rate / 100.0;
  42.     amount = principal * pow(1 + (rateDecimal / timesCompounded), timesCompounded);
  43.     interest = amount - principal;
  44.  
  45.     // Display the report formatted to match the required output[cite: 6]
  46.     cout << "\n";
  47.     cout << left << setw(20) << "Interest Rate:" << right << setw(7) << rate << "%" << endl;
  48.     cout << left << setw(20) << "Times Compounded:" << right << setw(7) << timesCompounded << endl;
  49.  
  50.     // Format numeric output for currency and align the decimals[cite: 6]
  51.     cout << fixed << setprecision(2);
  52.     cout << left << setw(20) << "Principal:" << "$ " << right << setw(7) << principal << endl;
  53.     cout << left << setw(20) << "Interest:" << "$ " << right << setw(7) << interest << endl;
  54.     cout << left << setw(20) << "Amount in Savings:" << "$ " << right << setw(7) << amount << endl;
  55.  
  56.     return 0;
  57. }
Success #stdin #stdout 0s 5324KB
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Standard input is empty
stdout
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Enter the principal balance: Enter the interest rate (as a percentage, e.g., 4.25): Enter the number of times the interest is compounded during a year: 
Interest Rate:      4.66203e-310%
Times Compounded:      5250
Principal:          $    0.00
Interest:           $    0.00
Amount in Savings:  $    0.00
https://ideone.com/mZWi63
CH3 #16
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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