Classes Example in C++


A class in C++ is the building block, that leads to Object-Oriented programming. It is a user-defined data type, which holds its own data members and member functions, which can be accessed and used by creating an instance of that class. A C++ class is like a blueprint for an object.

Example Program:

Find out the area of rectangle using classes in C++

Source Code

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;
    cout<<"Area : "<<r.area();
    return 0;
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Area : 50

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