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  1. //Micah Krosby						CS1A					 Ch. 3, P. 147, # 19
  2. /*******************************************************************************
  3.  * CALCULATE AMOUNT OF PIZZAS FOR A GROUP
  4.  * _____________________________________________________________________________
  5.  * This program finds the amount of pizzas a group would need depending on pizza
  6.  * diameter and the amount of people in the group.
  7.  * 
  8.  * FORMULAE-
  9.  * Area required = people * slices per person * single slice area
  10.  * Pizzas required = area required / (pi * (diameter / 2)^2)
  11.  * _____________________________________________________________________________
  12.  * 
  13.  * CONSTANTS-
  14.  * MATH_PI				:	Value of pi rounded to nearest hundredth
  15.  * SLICES_PER_PERSON	:	Amount of slices one person will eat
  16.  * SINGLE_SLICE_AREA	:	Amount of area one slice might have
  17.  * 
  18.  * INPUTS-
  19.  *	attendance			:	Amount of people attending
  20.  *	diameter			:	Requested diameter of pizzas
  21.  * 
  22.  * OUTPUTS-
  23.  *	sliceArea			:	Amount of pizza area required
  24.  *	pizzaQuantity		:	Amount of pizzas required
  25.  * 
  26. *******************************************************************************/
  27.  
  28. #include <iostream>
  29. #include <iomanip>
  30. #include <cmath>
  31. #define MATH_PI 3.14				//CONST- Pi rounded to the nearest hundredth
  32. #define SLICES_PER_PERSON 4			//CONST- Amount of slices per person
  33. #define SINGLE_SLICE_AREA 14.125	//CONST- Amount of area in one slice
  34. using namespace std;
  35.  
  36. int main() {
  37. 	int attendance;			//INPUT- Amount of people attending
  38. 	float diameter;			//INPUT- Diameter of pizzas requested
  39. 	float sliceArea;		//OUTPUT- Area of pizzas requested
  40. 	float pizzaQuantity;	//OUTPUT- Quantity of pizzas required
  41.  
  42. 	//Initialize input variables
  43. 	cout << "How many people will be attending?" << endl;
  44. 	cin >> attendance;
  45. 	cout << "What diameter shall the pizzas be?" << endl;
  46. 	cin >> diameter;
  47.  
  48. 	//Calculate output variables
  49. 	sliceArea = attendance * SLICES_PER_PERSON * SINGLE_SLICE_AREA;
  50. 	pizzaQuantity = sliceArea / (MATH_PI * pow(diameter / 2, 2));
  51.  
  52. 	//Output
  53. 	cout << "The amount of pizzas required will be " << ceil(pizzaQuantity) 
  54. 	<< endl;
  55.  
  56. 	return 0;
  57. }
Success #stdin #stdout 0s 5280KB
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How many people will be attending?
What diameter shall the pizzas be?
The amount of pizzas required will be 15
https://ideone.com/iyk9L6
homework 3.19
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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