Write a c++ program to calculate the area and perimeter of rectangle using concept of inheritance

Certainly! Below is an example of a C++ program that demonstrates the concept of inheritance to calculate the area and perimeter of a rectangle. In this program, we will create a base class `Shape` that handles basic shape-related functionalities, and a derived class `Rectangle` that implements specific functionalities for a rectangle.

```cpp
#include <iostream>

using namespace std;

// Base class
class Shape {
public:
    // Function to calculate area (to be overridden)
    virtual double area() = 0;

    // Function to calculate perimeter (to be overridden)
    virtual double perimeter() = 0;
};

// Derived class
class Rectangle : public Shape {
private:
    double length;
    double width;

public:
    // Constructor to initialize the rectangle dimensions
    Rectangle(double l, double w) : length(l), width(w) {}

    // Override area calculation
    double area() override {
        return length * width;
    }

    // Override perimeter calculation
    double perimeter() override {
        return 2 * (length + width);
    }
};

int main() {
    double length, width;

    // Get user input
    cout << "Enter the length of the rectangle: ";
    cin >> length;
    cout << "Enter the width of the rectangle: ";
    cin >> width;

    // Create a Rectangle object
    Rectangle rectangle(length, width);

    // Calculate and display the area and perimeter
    cout << "Area of the rectangle: " << rectangle.area() << endl;
    cout << "Perimeter of the rectangle: " << rectangle.perimeter() << endl;

    return 0;
}
```

### Explanation:
1. **Base Class (`Shape`)**: This class contains two pure virtual functions `area()` and `perimeter()`. This makes it an abstract class, meaning you cannot instantiate it directly.

2. **Derived Class (`Rectangle`)**: The `Rectangle` class inherits from `Shape` and must implement the `area()` and `perimeter()` methods. It also has private attributes `length` and `width` to hold the dimensions of the rectangle.

3. **Constructor**: The constructor of the `Rectangle` class initializes the rectangle's length and width.

4. **Main Function**: The `main()` function requests user input to get the rectangle's dimensions, creates a `Rectangle` object, and then calls the `area()` and `perimeter()` methods to display the results.

### How to Compile and Run:
To compile and run the program, please follow these steps:

1. Save the code in a file named `RectangleAreaPerimeter.cpp`.
2. Open your terminal or command prompt and navigate to the directory where the file is saved.
3. Compile the program using:
   ```bash
   g++ RectangleAreaPerimeter.cpp -o RectangleAreaPerimeter
   ```
4. Run the generated executable:
   ```bash
   ./RectangleAreaPerimeter
   ```

Now, the program will prompt you to enter the dimensions of the rectangle and will subsequently display the area and perimeter.