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  1. //Andres Guzman CSC5 Chapter 4, P. 225, #21
  2. //
  3. /**************************************************************
  4. *
  5. * SELECT CALCULATION OPTION
  6. * ____________________________________________________________
  7. * This program will allow the user to select an option to calculate.
  8. *
  9. * Computation is based on the formula:
  10. * area1 = pi * pow(radius,2)
  11. * area2 = length * width
  12. * area3 = length * height
  13. * ____________________________________________________________
  14. * INPUT
  15. * radius = Input the radius for an object
  16. * length = Input the desired length of an object
  17. * width = Input desired width of an object
  18. * height = Input desired height for an object
  19. * OUTPUT
  20. * area1 = The area of a circle
  21. * area2 = The area of a rectangle
  22. * area3 = The area of a triangle
  23. *
  24. **************************************************************/
  25. #include <iostream>
  26. #include <cmath>
  27. using namespace std;
  28.  
  29. int main()
  30. {
  31. //
  32. //Initlaizing Variabales
  33. 	int choice;		//Holds the input for the choices
  34. 	double area1, area2, area3;		//Holds room for different areas of calculation
  35. 	double pi = 3.14159;		//Holds a fraction of pi
  36. 	double radius, length, width, height;	//Holds the different input measurements
  37. 	const int CIR_AREA = 1;		//Option 1 for the circle
  38. 	const int REC_AREA = 2;		//Option 2 for the rectangle
  39. 	const int TRI_AREA = 3;		//Option 3 for the triangle
  40. 	const int QUIT = 4;			//Option to end program
  41. //
  42. //Output Options
  43. 	cout << "\t\Geometry Calculator\n\n"
  44. 		 << "1. Calculate the Area of a Circle\n"
  45. 		 << "2. Calculate the Area of a Rectangle\n"
  46. 		 << "3. Calculate the Area of a Triangle\n"
  47. 		 << "4. Quit\n"
  48. 		 << "Enter your choice (1-4): ";
  49. 	cin >> choice;
  50. //
  51. //Initialize option selection
  52. 	switch(choice)
  53. 	{
  54. 		case 1 : cout << "\nWhat is the radius of the circle? ";
  55. 				 cin >> radius;
  56. 				 area1 = pi * pow(radius,2);	//Calculates area of circle
  57. 				 cout << "\nArea: " << area1;
  58. 				 break;
  59. 		case 2 : cout << "\nWhat is the length of the rectangle? ";
  60. 				 cin >> length;
  61. 				 cout << "\nWhat is the width of the rectangle? ";
  62. 				 cin >> width;
  63. 				 area2 = length * width;	//calculates the area of a rectangle
  64. 				 cout << "\nArea: " << area2;
  65. 				 break;
  66. 		case 3 : cout << "\nWhat is length of the Triangle? ";
  67. 				 cin >> length;
  68. 				 cout << "\nWhat is the height of the Triangle? ";
  69. 				 cin >> height;
  70. 				 area3 = length * height * .5;	//calculates the area of a triangle
  71. 				 cout << "\nArea: " << area3;
  72. 				 break;
  73. 		case 4 : cout << "\nTerminating Program.";
  74. 				 break;
  75. 		default : cout << "\nInvalid input. Please input 1, 2, 3, or 4.";
  76. 				 break;
  77. 	}
  78. 	return 0;
  79. }
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	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): 
What is the radius of the circle? 
Area: 153.938
https://ideone.com/JbmdSa
Chapter 4 #21 Geometry Calculator
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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