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  1. //Cecilia Rangel CSC5 Chapter 4, P. 225, #23
  2. //
  3. /**************************************************************
  4.  *
  5.  * Computing mobile service charge
  6.  * ____________________________________________________________
  7.  * This program computes which number is the smaller or bigger
  8.  * out of two numbers prompted by the user
  9.  *
  10.  * Computation is based on the following formulas:
  11.  * Additional (Add'l) minutes = Total minutes - Minutes included
  12.  * Charge = Base charge + Add'l minutes * Add'l minute rate
  13.  *___________________________________________________________
  14.  * CONSTANTS
  15.  * 		packageA            : Menu choice for Package A
  16.  * 		packageB            : Menu choice for Package B
  17.  * 		packageC            : Menu choice for Package C
  18.  *
  19.  * INPUT
  20.  * 		packageChoice       : User choice among menu options
  21.  *		totalMin            : Number of minutes used by user
  22.  *		base_A              : Base charge for Package A
  23.  *		minIncl_A           : Number of minutes included with base charge
  24.  *	        	              of Package A
  25.  *		addlMinRate_A       : Rate of charge per add'l minute for Package A
  26.  *		base_B              : Base charge for Package B
  27.  *		minIncl_B           : Number of minutes included with base charge
  28.  *	    	                  of Package B
  29.  *		addlMinRate_B       : Rate of charge per add'l minute for Package B
  30.  *		base_C              : Base charge for Package C
  31.  *	
  32.  * OUTPUT
  33.  *		addlMin             : Add'l minutes to be charged extra
  34.  *		charge              : Total charge for service
  35.  *
  36.  **************************************************************/
  37. #include <iostream>
  38. #include <iomanip>
  39. using namespace std;
  40.  
  41. int main() {
  42. 	const int packageA = 1;       // CONSTANT - Menu choice for Package A
  43. 	const int packageB = 2;       // CONSTANT - Menu choice for Package B
  44. 	const int packageC = 3;       // CONSTANT - Menu choice for Package C
  45.  
  46. 	int packageChoice;            // INPUT - User choice among menu options
  47. 	int totalMin;                 // INPUT - Number of minutes used by user
  48. 	double base_A = 39.99;        // INPUT - Base charge for Package A
  49. 	int minIncl_A = 450;          // INPUT - Number of minutes included with
  50. 	                              //         base charge of package A
  51. 	double addlMinRate_A = 0.45;  // INPUT - Rate of charge per add'l minute
  52. 	                              //         for Package A
  53. 	double base_B = 59.99;        // INPUT - Base charge for Package B
  54. 	int minIncl_B = 900;          // INPUT - Number of minutes included with
  55. 	                              //         base charge of Package B
  56. 	double addlMinRate_B = 0.40;  // INPUT - Rate of charge per add'l minute
  57. 	                              //         for Package B
  58. 	double base_C = 69.99;        // INPUT - Base charge for Package A
  59. 	int addlMin;                  // OUTPUT - Add'l minutes to be charged extra
  60. 	double charge;                // OUTPUT - Total charge for service
  61. //
  62. //	Prompt User to Specify Package and Minutes Used
  63. 	cout << "1. Package A:  $39.99/mo for 450 min. + $0.45/add'l min." << endl;
  64. 	cout << "2. Package B:  $59.99/mo for 900 min. + $0.40/add'l min." << endl;
  65. 	cout << "3. Package C:  $69.99/mo for Unlimited min." << endl << endl;
  66. 	cout << "Which of the above packages are you subscribed to? (1-3): ";
  67. 	cin >> packageChoice;
  68. 	cout << endl << left;
  69. 	cout << setw(56) << "How many minutes did you use?" << ": ";
  70. 	cin >> totalMin;
  71. 	cout << right;
  72. 	cout << endl;
  73. //
  74. //	Calculate Monthly Charge Based on Subscription; Output Results
  75. 	if (totalMin >= 0)
  76. 	{
  77. 		switch (packageChoice)
  78. 		{
  79. 			case packageA:
  80. 				addlMin = totalMin - minIncl_A;
  81. 				charge = base_A + addlMin * addlMinRate_A;
  82. 				cout << "Total charge: $" << charge;
  83. 				break;
  84. 			case packageB:
  85. 				addlMin = totalMin - minIncl_B;
  86. 				charge = base_B + addlMin * addlMinRate_B;
  87. 				cout << "Total charge: $" << charge;
  88. 				break;
  89. 			case packageC:
  90. 				charge = base_C;
  91. 				cout << "Total charge: $" << charge;
  92. 				break;
  93. 			default:
  94. 				cout << "You must select your package by entering 1, 2, or 3.";
  95. 		}
  96. 	}
  97. 	else
  98. 		cout << "Your number of used minutes must be at least 0.";
  99.  
  100. 	return 0;
  101. }
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1. Package A:  $39.99/mo for 450 min. + $0.45/add'l min.
2. Package B:  $59.99/mo for 900 min. + $0.40/add'l min.
3. Package C:  $69.99/mo for Unlimited min.

Which of the above packages are you subscribed to? (1-3): 
How many minutes did you use?                           : 
Total charge: $69.99
https://ideone.com/VuaeSa
language:
C++ (gcc 8.3)
created:
19 hours ago
visibility:
public

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