Implement the Factory Method Pattern

Medium Design Patterns & Final Challenges

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Problem Statement

Create a `Shape` base class with a virtual `draw()` method. Derive `Circle` and `Square`. Create a `ShapeFactory` class with a static method `Shape* createShape(std::string type)`. Read a shape name, get it from the factory, and call `draw()`. Remember to `delete` the pointer.

Input Format

A string representing the shape type ('Circle' or 'Square').

Output Format

Print 'Drawing Circle' or 'Drawing Square'.

Constraints

None

Sample Input

Circle

Sample Output

Drawing Circle

Explanation

The Factory Method pattern abstracts the instantiation logic, returning a derived object via a base class pointer based on an input string or condition.

Starter Code

#include <iostream>
#include <string>

class Shape {
public:
    virtual void draw() = 0;
    virtual ~Shape() {}
};

// Implement Circle, Square, and ShapeFactory

int main() {
    // Read input, create shape via factory, draw, and delete
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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