The Virtual Table (V-Table) Concept

Medium Virtual Functions & Abstract Classes

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Problem Statement

Create an `Empty` class with nothing in it. Create a `VirtualEmpty` class with one virtual function `virtual void test() {}`. In `main()`, compare their memory footprints using `sizeof()`. If `sizeof(VirtualEmpty) > sizeof(Empty)`, print ‘Has VTable: True’.

Input Format

None

Output Format

Print the boolean comparison result.

Constraints

None

Sample Output

Has VTable: True

Explanation

Adding a virtual function silently injects a hidden pointer (v-ptr) into the object, increasing its memory size to maintain the Virtual Table.

Starter Code

#include <iostream>

class Empty {};

class VirtualEmpty {
public:
    // Add a virtual method
};

int main() {
    // Compare sizes and print result
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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