fork download
copy 
  1. //Cecilia Rangel CSC5 Chapter 4, P. 225, #21
  2. //
  3. /**************************************************************
  4.  *
  5.  * Computing geometry calculator
  6.  * ____________________________________________________________
  7.  * This program computes the area of specific shapes
  8.  * 
  9.  *
  10.  * Computation is based on the following formulas:
  11.  * Area of Circle = PI * (Radius)^2
  12.  * Area of Rectangle = Length * Width
  13.  * Area of Triangle = Base * Height * .5
  14.  *___________________________________________________________
  15.  * CONSTANTS
  16.  * 		PI                  : Value of pi to 5 decimal places (3.14159)
  17.  * 		Circle choice       : Menu option for a circle
  18.  * 		Rectangle choice    : Menu option for a rectangle
  19.  * 		Triangle choice     : Menu option for a triangle
  20.  *	 	Quit choice         : Menu option for exiting the program immediately
  21.  *
  22.  * INPUT
  23.  * 		choice              : Integer expression for choosing menu option
  24.  *		radius              : Measurement of circle's radius
  25.  *		length              : Measurement of rectangle's length
  26.  *		width               : Measurement of rectangle's width
  27.  *		base                : Measurement of triangle's base
  28.  *		height              : Measurement of triangles height
  29.  *	
  30.  * OUTPUT
  31.  *		display		  : which number is greater
  32.  *
  33.  **************************************************************/
  34. #include <iostream>
  35. #include <iomanip>
  36. #include <cmath>
  37. using namespace std;
  38.  
  39. int main() {
  40. 	const double PI = 3.14159;        
  41. 	const int CIRCLE_CHOICE = 1;      
  42. 	const int RECTANGLE_CHOICE = 2;   
  43. 	const int TRIANGLE_CHOICE = 3;    
  44. 	const int QUIT_CHOICE = 4;       
  45.  
  46.  
  47. 	int choice;			
  48. 	double radius;     
  49. 	double length;     
  50. 	double width;       
  51. 	double base;       
  52. 	double height;      
  53. 	double area;        
  54.  
  55. 	cout << "Geometry Calculator" << endl << endl;
  56. 	cout << "    1. Calculate the Area of a Circle" << endl;
  57. 	cout << "    2. Calculate the Area of a Rectangle" << endl;
  58. 	cout << "    3. Calculate the Area of a Triangle" << endl;
  59. 	cout << "    4. Quit" << endl << endl;
  60. 	cout << "    Enter your choice (1-4): ";
  61. 	cin >> choice;
  62. 	cout << endl << endl;
  63.  
  64. 	cout << left;
  65. 	switch (choice)
  66. 	{
  67. 		case CIRCLE_CHOICE:
  68. 			cout << "1. AREA OF A CIRCLE:" << endl;
  69. 			cout << setw(14) << "Enter radius: ";
  70. 			cin >> radius;
  71. 			if (radius > 0)
  72. 			{
  73. 				area = PI * pow(radius, 2);
  74. 				cout << endl;
  75. 				cout << setw(14) << "Area: " << area;
  76. 			}
  77. 			else
  78. 				cout << "Radius must be positive! Run program again.";
  79. 			break;
  80. 		case RECTANGLE_CHOICE:
  81. 			cout << "2. AREA OF A RECTANGLE:" << endl;
  82. 			cout << setw(14) << "Enter length: ";
  83. 			cin >> length;
  84. 			cout << setw(14) << "Enter width: ";
  85. 			cin >> width;
  86. 			if (length > 0 && width > 0)
  87. 			{
  88. 				area = length * width;
  89. 				cout << endl;
  90. 				cout << setw(14) << "Area: " << area;
  91. 			}
  92. 			else
  93. 				cout << "Length & width must be positive! Run program again.";
  94. 			break;
  95. 		case TRIANGLE_CHOICE:
  96. 			cout << "3. AREA OF A TRIANGLE:" << endl;
  97. 			cout << setw(19) << "Enter base length: ";
  98. 			cin >> base;
  99. 			cout << setw(19) << "Enter height: ";
  100. 			cin >> height;
  101. 			if (base > 0 && height > 0)
  102. 			{
  103. 				area = base * height * .5;
  104. 				cout << endl;
  105. 				cout << setw(19) << "Area: " << area;
  106. 			}
  107. 			else
  108. 				cout << "Base & height must be positive! Run program again.";
  109. 			break;
  110. 		case QUIT_CHOICE:
  111. 			break;
  112. 		default:
  113. 			cout << "Your choice must a number from 1-4! Run program again.";
  114. 	}
  115. 	cout << right;
  116. 	return 0;
  117. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
copy 
1
3
stdout
copy 
Geometry Calculator

    1. Calculate the Area of a Circle
    2. Calculate the Area of a Rectangle
    3. Calculate the Area of a Triangle
    4. Quit

    Enter your choice (1-4): 

1. AREA OF A CIRCLE:
Enter radius: 
Area:         28.2743
https://ideone.com/EyD4JU
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!