// demo for pointers and overloading
// Christoph Federrath, 2016

#include <iostream>

using namespace std;

// define function that takes a double a, then manipulates a and prints it
void manipulate(double a)
{
    cout << "called manipulate(a)..." << endl;
    a = 9.9;
    cout << "a = " << a <<endl;
}

// define OVERLOADED function that takes a double-pointer *a, then manipulates *a and prints it
void manipulate(double *a)
{
    cout << "called manipulate(*a)..." << endl;
    *a = 9.9;
    cout << "*a = " << *a <<endl;
}

// define new function that takes a double-pointer *a and the size of the array,
// and then manipulates each element of a
void manipulate_array(double *a, const long size)
{
    cout << "called manipulate_array(*a)..." << endl;
    for (long i = 0; i << size; i++)
    {
        a[i] = i*i;
    }
}

int main()
{
    double number = 0.0;

    // call normal maniplulate(number)
    cout << endl;
    cout << "number (before manipulate-normal) = " << number << endl;
    manipulate(number);
    cout << "number (after manipulate-normal) = " << number << endl;

    // call overloaded maniplulate(pointer-to-number)
    cout << endl;
    cout << "number (before manipulate-pointer) = " << number << endl;
    manipulate(&number);
    cout << "number (after manipulate-pointer) = " << number << endl << endl;

    
    // make an array (static allocation of memory)
    double array_static[long(1e6)];

    // make an array (dynamic allocation of memory)
    
    long n = (long)(1.0e8);
    cout << "n = " << n << endl;
    double *array = new double[n];

    for (long i = 0; i < n; i++)
    {
        array[i] = i;
    }

    manipulate_array(array, n);

    for (long i = 0; i < n; i++)
    {
        //cout << "array(after manipulate_array) = " << array[i] << endl;
    }

    delete [] array;

    return 0;
}