Question

C++ Programming Question for an intro course

Complete a program that determines how many brownies will fit in a baking pan of a specified size. The program should do the following correctly:  Prompt the user to enter the length and width (in inches) of a baking pan.  Compute the surface area of the bottom of the pan.  Compute how many small brownies the pan will hold if each one is cut with a 1”x1” square bottom.  Compute how many big brownies the pan will hold if each one is cut with a 2”x2” square bottom.  Display, with appropriate labels, the pan dimensions, the number of small brownies, and the number of large brownies the pan can hold. The output might look something like this: A 12 X 9 inch pan can hold 108 small brownies or 27 large brownies.

Answer 1

Answer: The sample output that is shown might not be correct. As the size of pan is 12 x 9, there is no way we can put more than 4 big brownies in the width of the pan, and because we can put 6 big brownies in the height, the maximum number of big brownies that we can place is 6*4 = 24 (and not 27) assuming we can not cut the brownies into half. Considering this the C++ code is as follows.

Code:

#include <iostream>

using namespace std;

int main(){
   int h,w,num_small,num_big;
   cout<<"Enter the length of the baking pan: ";
   cin>>h;
   cout<<"Enter the width of the baking pan: ";
   cin>>w;
   // As each cell in (h x w) pan will have a size of (1 x 1),
   // so h*w smaller brownies will fit in (h x w) sized pan.
   num_small = h*w;
   // As each (2 x 2) cell in (h x w) pan will fit a bigger brownie,
   // so only way to put brownies in the pan is if their number divides
   // the dimension of the pan evenly. Thus (h/2)*(w/2) (integer division)
   // bigger brownies will fit in the pan.
   num_big = (h/2)*(w/2);
   cout<<"A "<<h<<" X "<<w<<" inch pan can hold "<<num_small
   <<" small brownies or "<<num_big<<" large brownies.\n";
   return 0;
}

Screenshot of output:

Answer 2

import java.util.Scanner;

public class BrownieCalculator {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        // Prompt user for pan dimensions

        System.out.print("Enter the length of the baking pan (in inches): ");

        double length = scanner.nextDouble();

        System.out.print("Enter the width of the baking pan (in inches): ");

        double width = scanner.nextDouble();

        // Compute surface area of the bottom of the pan

        double surfaceArea = length * width;

        // Compute number of small and large brownies

        int smallBrownies = (int) surfaceArea;

        int largeBrownies = (int) (surfaceArea / 4);

        // Display the results

        System.out.println("A " + length + " X " + width + " inch pan can hold "

                + smallBrownies + " small brownies or " + largeBrownies + " large brownies.");

        scanner.close();

    }

}