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  1. // Renee V. Lopez            CS1A                         Chapter 3 P.146 #17
  2. /******************************************************************************
  3.  * Calculate Pizza Slices
  4.  * _____________________________________________________________________________
  5.  * This program calculates the number of slices a pizza can be divided into,
  6.  * based on its diameter. Each slice should have an area of 14.125 square inches.
  7.  * 
  8.  * _____________________________________________________________________________
  9.  * INPUT
  10.  * diameter               : The diameter of the pizza in inches
  11.  * _____________________________________________________________________________
  12.  * OUTPUT
  13.  * slices                : Number of slices the pizza can be divided into
  14.  * ****************************************************************************/
  15. #include <iostream>
  16. #include <iomanip> // For setting output precision
  17.  
  18. using namespace std;
  19.  
  20. int main() {
  21.     // Define constants
  22.     const double PI = 3.14159;       // Named constant for PI
  23.     const double SLICE_AREA = 14.125; // Area of each pizza slice in square inches
  24.  
  25.     // Declare variables
  26.     double diameter; // Diameter of the pizza
  27.     double radius;   // Radius of the pizza
  28.     double area;     // Area of the pizza
  29.     double slices;   // Number of slices
  30.  
  31.     // Prompt user for diameter of the pizza
  32.     cout << "Enter the diameter of the pizza in inches: ";
  33.     cin >> diameter;
  34.  
  35.     // Calculate the radius of the pizza
  36.     radius = diameter / 2.0;
  37.  
  38.     // Calculate the area of the pizza
  39.     area = PI * radius * radius;
  40.  
  41.     // Calculate the number of slices
  42.     slices = area / SLICE_AREA;
  43.  
  44.     // Display the number of slices, rounded to one decimal place
  45.     cout << fixed << setprecision(1);
  46.     cout << "Number of slices: " << slices << endl;
  47.  
  48.     return 0;
  49. }
Success #stdin #stdout 0s 5284KB
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Enter the diameter of the pizza in inches: Number of slices: 64.3
https://ideone.com/qSdMOh
Pizzzaaaa yay
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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