pizza2.cpp

C++&datastructure书籍源码,以前外教提供现在与大家共享

#include <iostream>
using namespace std;

// find the price per square inch of pizza
// to compare large and small sizes for the best value
//
// Owen Astrachan
// March 29, 1999
//

double Cost(double radius, double price)
// postcondition: returns the price per sq. inch
{
    return price/(3.14159*radius*radius);
}

int main()
{
    double smallRadius, largeRadius;
    double smallPrice, largePrice;
    double smallCost,largeCost;

    // input phase of computation
    
    cout << "enter radius and price of small pizza ";
    cin >> smallRadius >> smallPrice;

    cout << "enter radius and price of large pizza ";
    cin >> largeRadius >> largePrice;


    // process phase of computation
    
    smallCost = Cost(smallRadius,smallPrice);
    largeCost = Cost(largeRadius,largePrice);

    // output phase of computation
    
    cout << "cost of small pizza = " << smallCost << " per sq.inch" << endl;
    cout << "cost of large pizza = " << largeCost << " per sq.inch" << endl;

    if (smallCost < largeCost)
    {   cout << "SMALL is the best value " << endl;
    }
    else
    {   cout << "LARGE is the best value " << endl;
    }
    
    return 0;
}