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  1. //Zachary Abdollahi            CS1A                  Chapter 3, P. 146, #16
  2. //
  3. /*******************************************************************************
  4.  * 
  5.  *	COMPUTE INTEREST EARNED
  6.  *	____________________________________________________________________________
  7.  * 
  8.  *	This program calculates the balance in a savings account after one year,
  9.  *	assuming there are no deposits other than the original investment.
  10.  * 
  11.  *	Computation is based on the formula:
  12.  *	Amount = Principal x (1 + Rate / T) ^ T
  13.  * _____________________________________________________________________________
  14.  * 
  15.  *	INPUT
  16.  *	  principal			: Balance in the savings account
  17.  *	  rate				: Interest rate
  18.  *	  timesCompounded   : Number of times interest is compounded during the year
  19.  *  
  20.  *	OUTPUT
  21.  *     interest         : Interest earned over the year
  22.  *     amount           : Amount in savings after one year
  23.  * 
  24.  ******************************************************************************/
  25. #include <iostream>
  26. #include <iomanip>
  27. #include <cmath>
  28. using namespace std;
  29. int main ()
  30. {
  31. 	float principal;		//INPUT  - Balance in the savings account
  32. 	float rate;				//INPUT  - Interest rate
  33. 	int timesCompounded;    //INPUT  - Number of times interest is compounded
  34. 	float interest;         //OUTPUT - Interest earned over the year
  35. 	float amount;			//OUTPUT - Amount in savings after one year
  36.  
  37. //
  38. //	Get Input From User
  39. 	cout << "Enter the principal: ";
  40. 	cin >> principal;
  41.  
  42. 	cout << "Enter the interest rate (as a percentage): ";
  43. 	cin >> rate;
  44.  
  45. 	cout << "Enter the number of times the interest rate is compounded: ";
  46. 	cin >> timesCompounded;
  47.  
  48. //
  49. //	Compute Amount in Savings and Interest Earned
  50. 	amount = principal * pow((1 + (rate / 100) / timesCompounded), timesCompounded);
  51. 	interest = amount - principal;
  52.  
  53. //
  54. //	Output Result
  55. 	cout << fixed << setprecision(2);
  56. 	cout << endl;
  57. 	cout << "Interest Rate:		 " << setprecision(2) << rate << "%" << endl;
  58. 	cout << "Times Compounded:   " << timesCompounded << endl;
  59. 	cout << "Principal:         $ " << setw(7) << principal << endl;
  60. 	cout << "Interest:          $ " << setw(7) << interest << endl;
  61. 	cout << "Amount in Savings: $ " << setw(7) << amount << endl;
  62.  
  63. 	return 0;
  64. }
Success #stdin #stdout 0.01s 5316KB
comments (?)
stdin 
Standard input is empty
stdout 
Enter the principal: Enter the interest rate (as a percentage): Enter the number of times the interest rate is compounded: 
Interest Rate:		 -0.00%
Times Compounded:   21891
Principal:         $    0.00
Interest:          $    0.00
Amount in Savings: $    0.00
https://ideone.com/wQ37OH
language:
C++ (gcc 8.3)
created:
3 hours ago
visibility:
public

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