Pure Virtual Functions (= 0)

Medium Virtual Functions & Abstract Classes

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Problem Statement

Define an `Instrument` class with a pure virtual function `virtual void sound() = 0;`. Create a `Guitar` class that inherits from it and implements `sound()` to print ‘Strum’. Instantiate `Guitar`, point an `Instrument*` to it, and call `sound()`.

Input Format

None

Output Format

Print the sound.

Constraints

None

Sample Output

Strum

Explanation

A pure virtual function (`= 0`) has no implementation in the base class, forcing derived classes to implement the logic.

Starter Code

#include <iostream>

class Instrument {
public:
    // Define pure virtual function
};

class Guitar : public Instrument {
public:
    // Implement sound()
};

int main() {
    // Setup pointer and execute
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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