fork download
copy 
  1. //George Molinero                  csc5                   chapter 4, P. 225, #21
  2. //
  3. /*******************************************************************************
  4.  * 
  5.  * Compute Area of Selected Shape
  6.  * _____________________________________________________________________________
  7.  * This program computes the area of the shape that is selected from the given 
  8.  * menu.
  9.  * _____________________________________________________________________________
  10.  * INPUT
  11.  *	 choice         : Option selection
  12.  *	 r			    : radius of cirle
  13.  * 	 length			: length of rectangle
  14.  * 	 width			: width of rectangle
  15.  *   base           : base of triangle
  16.  *   height         : height of triangle
  17.  * 
  18.  * OUTPUT
  19.  *	 calculated Area
  20.  ******************************************************************************/
  21. #include <iostream>
  22. using namespace std;
  23. int main ()
  24. {
  25. 	const int Circle = 1;
  26. 	const int Rectangle = 2;
  27. 	const int Triangle = 3;
  28. 	const int Quit = 4;
  29. 	int choice;
  30. 	float r;
  31. 	float length;
  32. 	float width;
  33. 	float base;
  34. 	float height;
  35. //
  36. //  Display Menu Selection
  37. 	cout << "Geometry Calculator" << endl << endl;
  38. 	cout << "1. Calculate the Area of a Circle" << endl;
  39. 	cout << "2. Calculate the Area of a Rectangle" << endl;
  40. 	cout << "3. Calculate the Area of a Triangle" << endl;
  41. 	cout << "4. Quit" << endl << endl;
  42. //
  43. //  Ask for selection
  44. 	cout << "Enter your choice (1-4):" << endl;
  45. 	cin >> choice;
  46. //
  47. //  input Validation
  48. 	if (choice >= 1 && choice <= 4)
  49. 	{
  50. 		switch(choice)
  51. 	{
  52.   		case Circle: 
  53.   			cout << "Enter the radius of the circle: " << endl;
  54.         	cin >> r;
  55.         	cout << endl;
  56.         	if(r >= 0)
  57.         	cout << "The area of the circle is " << 3.14159 * (r * r) << endl;
  58.     		 else
  59.         	 cout << "radius cannot be negative";
  60.     		 break;
  61.  
  62.     	case Rectangle: 
  63.     		cout << "Enter the length of the rectangle: " << endl;
  64.         	cin >> length;
  65.     		cout << "Enter the width of the rectangle: " << endl;
  66.     		cin >> width;
  67.     		cout << endl;
  68.     		if(length >= 0 && width >= 0)
  69.     		cout << "The area of the rectangle is " << length * width << endl;
  70.     		else
  71.         	cout << "Both length and width have to be positive";
  72.     		break;
  73.  
  74.     	case Triangle:
  75.         	cout << "Enter the length of the triagle's base: " << endl;
  76.         	cin >> base;
  77.         	cout << "Enter the height of the triangle: " << endl;
  78.         	cin >> height;
  79.         	cout << endl;
  80.         	if(base >= 0 && height >= 0)
  81.         	cout << "The area of the triangle is " << base * height * 0.5;
  82.             else
  83.             cout << "Both base and height have to be positive";
  84.             break;
  85.  
  86.     	case Quit:
  87.         	cout << endl << "Program ending." << endl;
  88.         	 break;
  89.     }
  90.     }
  91.     else
  92.       cout << endl << "ERROR: The valid choices are 1 through 4." << endl;
  93.    	  return 0;
  94. }
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
copy 
2
5
6
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):
Enter the length of the rectangle: 
Enter the width of the rectangle: 

The area of the rectangle is 30
https://ideone.com/FWili7
CH. 4 #21
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
secret

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!