Question

For this lab you will be creating a class representing the shape square. A Square is a special case of a Rectangle where both sides have the same length. Rectangle has been provided for your use in this lab. A Rectangle has a height and a width as member variables, two constructors, two member functions, area() and perimeter(), and lastly, an input and output operator. Your Square class should publicly inherit from Rectangle. You will need to update the Constructors and the input/output operators to reflect that both sides, height and width are now equal. The Constructors should be default, which sets the height and width to 0, and a constructor that takes in a single double n and sets height and width to n. The operator<< should output the side size of the square to the stream. The operator>> should read in a double and store the information in the square correctly. NOTE: You should be able to output a square to a file using operator<< and read it back in to a square using operator>>. You have been given a text file containing a list of side sizes for some squares, you will need to write a small program that reads in each of these sides, stores it in a square, and then prints the perimeter and area of each square in the list

shell code

#ifndef _REC_H_
#define _REC_H_

#include <iostream>
using namespace std;

class Rectangle {
        public:
                Rectangle(): height_(0), width_(0) {}
                Rectangle(double h, double w): height_(h), width_(w) {}

                double area() { return height_ * width_; }
                double perimeter() { return 2 * height_ + 2 * width_; }

                friend istream& operator>>(istream&, Rectangle&);
                friend ostream& operator<<(ostream&, const Rectangle&);

        protected:
                double height_;
                double width_;
};

istream& operator>>(istream& in, Rectangle& r) {
        in >> r.height_;
        in >> r.width_;

        return in;
}

ostream& operator<<(ostream& out, const Rectangle& r) {
        out << r.height_ << " " << r.width_;

        return out;
}

#endif

square sizes

1 2 3 4 5 10 15

c++