How to Define a Move Constructor in C++?

// C++ program to declare move constructor
#include <iostream>
#include <vector>
using namespace std;

// Move Class
class moveClass {
private:
    // Declaring the raw pointer
    int* p;

public:
    // Default Constructor
    moveClass(int d)
    {
        // Declaring object in the heap
        p = new int;
        *p = d;
        cout << "Default Constructor is called for " << d
             << endl;
    };

    // Move Constructor
    moveClass(moveClass&& source)
        : p{ source.p }
    {

        cout << "Move Constructor is called for "
             << *source.p << endl;
        source.p = nullptr;
    }

    // Destructor
    ~moveClass()
    {
        cout << "Destructor invoked!\n";

        // Free up the memory assigned to
        // The data member of the object
        delete p;
    }
};

int main()
{
    // Vector of Move Class
    vector<moveClass> vec;

    // Inserting Object of Move Class
    vec.push_back(moveClass{ 10 });
    return 0;
}