Classes Example in C++

This program defines a Rectangle class with length and breadth as its data members and area() and perimeter() as its member functions. In the main() function, an object r of the Rectangle class is created and its length and breadth values are set to 5 and 10 respectively. Then, the area() function is called using the r object to calculate and display the area of the rectangle. Note that the perimeter() function is not used in this program.

Source Code

#include<iostream>
using namespace std;
class Rectangle
{
public :
    int length;
    int breadth;
    int area()
    {
        return length*breadth;
    }
    int perimeter()
    {
        return 2*(length+breadth);
    }
};
int main()
{
    Rectangle r;
    r.length=5;
    r.breadth=10;
    cout<<"Area : "<<r.area();
    return 0;
}

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Output

Area : 50

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