Memory Management in C++:

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1️⃣ Dynamic Memory Allocation Example

📌 Explanation: new is used to allocate memory dynamically, and delete is used to free the allocated memory.

#include <iostream>
using namespace std;

int main() {
    int* ptr = new int;  // Allocating memory for an integer

    *ptr = 42;  // Assigning value

    cout << "Dynamically allocated value: " << *ptr << endl;

    delete ptr;  // Freeing memory

    return 0;
}

📝 Output:

Dynamically allocated value: 42

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2️⃣ Creation & Deletion of a Dynamic Array

📌 Explanation: We allocate an array dynamically using new and release it using delete[].

#include <iostream>
using namespace std;

int main() {
    int size;
    cout << "Enter the size of the array: ";
    cin >> size;

    int* arr = new int[size];  // Dynamic memory allocation for array

    // Assigning values
    for (int i = 0; i < size; i++) {
        arr[i] = (i + 1) * 10;
    }

    // Displaying values
    cout << "Array values: ";
    for (int i = 0; i < size; i++) {
        cout << arr[i] << " ";
    }
    cout << endl;

    delete[] arr;  // Freeing dynamically allocated array

    return 0;
}

📝 Output (Example for size = 5):

Enter the size of the array: 5
Array values: 10 20 30 40 50

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3️⃣ Dynamic 2D Array Allocation & Deletion

📌 Explanation: Allocating and deallocating a 2D array dynamically.

#include <iostream>
using namespace std;

int main() {
    int rows = 3, cols = 3;

    // Dynamic allocation of 2D array
    int** arr = new int*[rows];
    for (int i = 0; i < rows; i++) {
        arr[i] = new int[cols];
    }

    // Assigning values
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            arr[i][j] = (i + 1) * (j + 1);
        }
    }

    // Displaying values
    cout << "2D Array values: " << endl;
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            cout << arr[i][j] << " ";
        }
        cout << endl;
    }

    // Deleting allocated memory
    for (int i = 0; i < rows; i++) {
        delete[] arr[i];
    }
    delete[] arr;

    return 0;
}

📝 Output:

2D Array values:
1 2 3
2 4 6
3 6 9

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Let me know if you need more examples! 🚀