Exercise 2: Modify the program above by adding a third structure named results w
ID: 656075 • Letter: E
Question
Exercise 2: Modify the program above by adding a third structure named
results which has two members area and perimeter. Adjust the rectan- gle structure so that both of its members are structure variables.
#include <iostream>
#include <iomanip>
using namespace std;
// This program uses a structure to hold data about a rectangle
struct dimensions
{
float length;
float width;
};
struct rectangle // FILL IN CODE TO define a structure named rectangle which has
// members length, width, area, and perimeter all of which are floats
{
float area;
float perimeter;
dimensions sizes;
};
int main()
{
rectangle box; // Fill IN CODE to declare a rectangle variable named box
cout << "Enter the length of a rectangle: ";
cin >> box.sizes.length; // FILL IN CODE to read in the length member of box
cout << "Enter the width of a rectangle: ";
cin >> box.sizes.width; // FILL IN CODE to read in the width member of box
cout << endl << endl:
box.area = (box.sizes.width) * (box.sizes.length); // FILL IN CODE to compute the area member of box
box.perimeter = 2 * ((box.sizes.length) + (box.sizes.width)); // FILL IN CODE to compute the perimeter member of box
cout << fixed << showpoint << setprecision(2);
cout << "The area of the rectangle is " << box.area << endl; // FILL IN CODE to output the area with an appropriate message
cout << "The perimeter of the recangle is " << box.perimeter << endl; // FILL IN CODE to output the perimeter with an appropriate message
return 0;
}
/*
Explanation / Answer
Please find the modified solution:(changes done are made to bold)
#include <iostream>
#include <iomanip> // setprecision
using namespace std;
// This program uses a structure to hold data about a rectangle
struct dimensions
{
float length;
float width;
};
struct Results
{
float value;
};
struct rectangle // FILL IN CODE TO define a structure named rectangle which has
// members length, width, area, and perimeter all of which are floats
{
Results area;
Results perimeter;
dimensions sizes;
};
int main()
{
rectangle box; // Fill IN CODE to declare a rectangle variable named box
cout << "Enter the length of a rectangle: ";
cin >> box.sizes.length; // FILL IN CODE to read in the length member of box
cout << "Enter the width of a rectangle: ";
cin >> box.sizes.width; // FILL IN CODE to read in the width member of box
cout << endl << endl;
box.area.value = (box.sizes.width) * (box.sizes.length); // FILL IN CODE to compute the area member of box
box.perimeter.value = 2 * ((box.sizes.length) + (box.sizes.width)); // FILL IN CODE to compute the perimeter member of box
cout << fixed << showpoint << setprecision(2);
cout << "The area of the rectangle is " << box.area.value << endl; // FILL IN CODE to output the area with an appropriate message
cout << "The perimeter of the recangle is " << box.perimeter.value << endl; // FILL IN CODE to output the perimeter with an appropriate message
return 0;
}
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