Constructor Initialization Lists

Medium Object Lifecycle (Constructors & Destructors)

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Problem Statement

Create an `Item` class with a `const int id`. Because it’s `const`, you MUST use a constructor initialization list to assign its value. Print ‘ID: [id]’ inside the constructor. Read an integer and instantiate the object.

Input Format

A single integer.

Output Format

Print the formatted ID.

Constraints

None

Sample Input

Sample Output

ID: 205

Explanation

Initialization lists `Class(int a) : var(a) {}` are required when setting values for const attributes or reference types.

Starter Code

#include <iostream>

class Item {
public:
    const int id;
    // Write constructor using an initialization list here
};

int main() {
    int val;
    if (std::cin >> val) {
        // Instantiate Item
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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