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  1. //Matthew Santos     CS1A    Ch. 4, Pg. 225, #21
  2. /***********************************************
  3.  * 
  4.  * CALCULATE AREAS
  5.  * _____________________________________________
  6.  * DESCRIPTION
  7.  * From a selection of different shapes, calculates
  8.  * the area of that selected shape.
  9.  * _____________________________________________
  10.  * INPUT
  11.  *      length: length of rectangle
  12.  *		width:  width of rectangle
  13.  *		radius: radius of circle
  14.  *		base:   width of base of triangle
  15.  *		height: height of triangle
  16.  * 
  17.  * OUTPUT
  18.  *      areaR: area of the rectangle
  19.  *		areaC: area of the circle
  20.  *      areaT: area of the triangle
  21.  ***********************************************/
  22. #include <iostream>
  23. using namespace std;
  24.  
  25. int main() {
  26.  
  27. 	//Initialize variables
  28. 	float length;
  29. 	float width;
  30. 	float radius;
  31. 	float base;
  32. 	float height;
  33. 	int choice;
  34. 	float areaR;
  35. 	float areaC;
  36. 	float areaT;
  37.  
  38. 	//Display menu
  39. 	cout << "1. Calculate the area of a circle" << endl;
  40. 	cout << "2. Calculate the area of a rectangle" << endl;
  41. 	cout << "3. Calculate the area of a triangle" << endl;
  42. 	cout << "4. Quit" << endl;
  43.  
  44. 	//Choose
  45. 	cin >> choice;
  46.  
  47. 	//Output according to choice
  48. 	switch (choice){
  49. 		case 1:
  50. 			cout << "Enter radius" << endl;
  51. 			cin >> radius;
  52. 			areaC = 3.14159 * (radius * radius);
  53. 			cout << areaC;
  54. 			break;
  55. 		case 2:
  56. 			cout << "Enter length and width" << endl;
  57. 			cin >> length;
  58. 			cin >> width;
  59. 			areaR = length * width;
  60. 			cout << areaR;
  61. 			break;
  62. 		case 3:
  63. 			cout << "Enter base and height" << endl;
  64. 			cin >> base;
  65. 			cin >> height;
  66. 			areaT = base * height * .5;
  67. 			cout << areaT;
  68. 			break;
  69. 		case 4:
  70. 			break;
  71. 	}
  72.  
  73. 	return 0;
  74. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
2
4
5
stdout 
1. Calculate the area of a circle
2. Calculate the area of a rectangle
3. Calculate the area of a triangle
4. Quit
Enter length and width
20
https://ideone.com/9nVcZp
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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