memory leak test

memoryTest.cpp

#include <iostream>

using namespace std;

void foo(unsigned long long n)
{
    double *ptr = new (std::nothrow) double[n];
    if (!ptr) {
        cout << "Failed to allocate double[n]" << endl;
    } else {
        ptr[1] = 1.0;
        ptr[n-1] = 2.0;
        cout << "double[n] is allocated successfully!" << endl;
    }
}

int main()
{
    cout << "The program is used to test memory leak. \n";
    cout << "Do not worry. It won't crash your computer.\n";
    cout << "The source code is available on https://gist.github.com/arraytools/6689581 \n" << endl;
    unsigned long long n;
    int testChoice;
    cout << "Enter your choice 1=main, 2=sub: ";
    cin >> testChoice;
    cout << "\nNext enter the array size (<= 18,446,744,073,709,551,615) : ";
    cout << "\nSome common scenarios";
    cout << "\n268,435,456-1 = 2GB";
    cout << "\n536,870,912-1 = 4GB";
    cout << "\n1,073,741,824-1 = 8GB";
    cout << "\n2,147,483,648-1 = 16GB";
    cout << "\n4,294,967,296-1 = 32GB";
    cout << "\n8,589,934,592-1 = 64GB";
    cout << "\n";
    cin >> n;
    if (testChoice == 1)
    {
        double *ptr = new (std::nothrow) double[n];
        if (!ptr)
        {
            cout << "Failed to allocate double[n]" << endl;
        } else {
            ptr[1] = 1.0;
            ptr[n-1] = 2.0;
            cout << "double[n] is allocated successfully!" << endl;
        }
    } else {
        foo(n);
    }
    return 0;
}