# Calculate the area of the rectangle.

Calculate the area of the rectangle.

$Calculate the area of the rectangle.$

## This Post Has 5 Comments

1. harveyangel123p2tjae says:

12

Step-by-step explanation:

You count all of the blue squares

2. Knownothing says:

12. Just count all of the blue squares.

3. mez64 says:

C.  Area of rectangle is A=L X W

If the length is 5 times bigger and the width is 5 times bigger, than the area is 25 times bigger

4. zurfluhe says:

There are 4 rectangles in the ArrayList shapes. ArrayLists start counting at 0 so when index is 3, dataRecord will be the 4th rectangle. The length and width of the 4th rectangle in shapes are both 4 so the area is 16 and the perimeter is 16. The answer is 3.

5. jnannsbwnw4216 says:

Check the attached image for code screenshot and output.

Explanation:

Rectangle.cpp

include "Rectangle.h"

Rectangle::Rectangle() {

length = 0;

width = 0;

}

Rectangle::Rectangle(double newLength, double newWidth) {

length = newLength;

width = newWidth;

}

void Rectangle::setLength(double l) {

length = l;

}

void Rectangle::setWidth(double w) {

width = w;

}

double Rectangle::getLength() {

return length;

}

double Rectangle::getWidth() {

return width;

}

double Rectangle::computeArea() {

return length * width;

}

double Rectangle::computePerimeter() {

return 2 * (length + width);

}

Rectangle Rectangle::operator++ () {

length++;

width++;

return *this;

}

Rectangle Rectangle::operator++ (int) {

Rectangle r(length, width);

++length;

++width;

return r;

}

Rectangle Rectangle::operator-- () {

if(length > 0) {

length--;

}

if(width > 0) {

width--;

}

return *this;

}

Rectangle Rectangle::operator-- (int) {

Rectangle r(length, width);

if(length > 0) {

length--;

}

if(width > 0) {

width--;

}

return r;

}

Rectangle Rectangle::operator- (Rectangle other) {

if(length > other.length && width > other.width) {

length--;

width--;

} else {

cout << "invalid operation. Subtrated Rectangle is bigger" << endl;

}

return *this;

}

bool Rectangle::operator==(Rectangle other) {

return (length == other.length) && (width == other.width);

}

bool Rectangle::operator!=(Rectangle other) {

return (length != other.length) || (width != other.width);

}

void Rectangle::printDetails() {

cout << "Rectangle Report" << endl;

cout << "Dimensions: " << length << " X " << width << endl;

cout << "Area: " << computeArea() << endl;

cout << "Perimeter: " << computePerimeter() << endl;

cout << "" << endl;

}

Rectangle.h

include<iostream>

include<iomanip>

using namespace std;

class Rectangle {

double length, width;

public:

Rectangle();

Rectangle(double newLength, double newWidth);

void setLength(double l);

void setWidth(double w);

double getLength();

double getWidth();

double computeArea();

double computePerimeter();

Rectangle operator++ ();

Rectangle operator++ (int);

Rectangle operator-- ();

Rectangle operator-- (int);

Rectangle operator- (Rectangle r);

bool operator== (Rectangle r);

bool operator!= (Rectangle r);

void printDetails();

};

main.cpp

include "Rectangle.h"

// Ask the user to type in a length and width and

// create an object called rect2 of the rectangle class

// See output for format

cout << "Enter the length of rectangle 3: ";

cin >> l;

cout << "Enter the width of rectangle 3: ";

cin >> w;

Rectangle rect3(l, w);

cout << endl;

cout.setf(ios::fixed);

cout.precision(1);

// Using the member function in the class, print rect1, rect2,

// and rect3 details in that order

rect1.printDetails();

rect2.printDetails();

rect3.printDetails();

cout << endl;

// Print each rectangle in the format shown on the output

cout << "Rectangle 1: " << rect1.getLength() << " X " << rect1.getWidth() << endl;

cout << "Area: " << rect1.computeArea() << " Perimeter: " << rect1.computePerimeter() << endl;

cout << "Rectangle 2: " << rect2.getLength() << " X " << rect2.getWidth() << endl;

cout << "Area: " << rect2.computeArea() << " Perimeter: " << rect2.computePerimeter() << endl;

cout << "Rectangle 3: " << rect3.getLength() << " X " << rect3.getWidth() << endl;

cout << "Area: " << rect3.computeArea() << " Perimeter: " << rect3.computePerimeter() << endl;

if(rect2 == rect3) {

cout << "rectangle 2 and 3 are same." << endl;

} else {

cout << "rectangle 2 and 3 are not same." << endl;

}

cout << "After incrementing rectangle 2: ";

rect2++;

rect2.printDetails();

return 0;

}