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  1. //Diego Martinez					CSC5				   Chapter 3, P. 147,#18
  2. /*******************************************************************************
  3. * Sizing pizza pies
  4. * ______________________________________________________________________________
  5. * This program a program to calculate the number of slices a pizza of any size
  6. * can be divided into.
  7. * 
  8. * Computation is based on the Formula:
  9. * radius = diameter / 2
  10. * Area = π × r²
  11. * numberOfSlices = pizzaArea / 14.125
  12. *______________________________________________________________________________
  13. * INPUT
  14. *	The user enters the diameter of the pizza.
  15. *	
  16. * OUTPUT
  17. *	Displays how many slices the pizza can make.
  18. *******************************************************************************/
  19. #include <iostream>
  20. #include <cmath>
  21. using namespace std;
  22.  
  23. int main() {
  24.     const double PI = 3.14159;
  25.     const double SLICE_AREA = 14.125; // area of one slice in square inches
  26.  
  27.     double diameter, radius, pizzaArea;
  28.     int numberOfSlices;
  29.  
  30.     // A) Ask the user for the diameter
  31.     cout << "Enter the diameter of the pizza in inches: ";
  32.     cin >> diameter;
  33.  
  34.     // Calculate radius
  35.     radius = diameter / 2;
  36.  
  37.     // Calculate area of pizza
  38.     pizzaArea = PI * pow(radius, 2);
  39.  
  40.     // B) Calculate number of slices
  41.     numberOfSlices = pizzaArea / SLICE_AREA;
  42.  
  43.     // C) Display result
  44.     cout << "A pizza with a diameter of " << diameter 
  45.          << " inches can be divided into " 
  46.          << numberOfSlices << " slices." << endl;
  47.  
  48.     return 0;
  49. }
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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Enter the diameter of the pizza in inches: A pizza with a diameter of 6.95315e-310 inches can be divided into 0 slices.
https://ideone.com/ayIPjn
Sizing pizza pies P. 147,#18
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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