#include <iostream>
#include <cstring>

int *retNoNew();
int *retNew();

int main()
{
    using namespace std;
    int *n1 = retNoNew();
    int *n2 = retNew();
    cout << "n1 = " << n1 << "\nn2 = " << n2 << endl;
    delete n1;
    delete n2;
}

int *retNoNew()
{
    int n = 3;
    return &n;
}

int *retNew()
{
    int *n = new int;
    *n = 4;
    return n;
}