#include<iostream>
#include<windows.h>
#include<stdio.h>
#include<limits.h>
#include<time.h>
#include<fstream>
#define DIV 1024
using namespace std;
int main()
{
    clock_t startTime;
    long int freeBytes;
    long int freePage;
    long int freeVirtual;
    MEMORYSTATUSEX MemoryInfo;
    GlobalMemoryStatusEx(&MemoryInfo);
    freeBytes = MemoryInfo.ullAvailPhys / DIV;
    freePage = MemoryInfo.ullAvailPageFile / DIV;
    freeVirtual = MemoryInfo.ullAvailVirtual / DIV;
    cout << "Available Physical Memory: " << MemoryInfo.ullAvailPhys / DIV << endl;
    cout << "Available Page File: " << MemoryInfo.ullAvailPageFile / DIV << endl;
    cout << "Available Virtual Memory" << MemoryInfo.ullAvailVirtual / DIV << endl;

    double Cache_size[15] = { 0.5,0.6,0.7,0.8 ,0.9, 0.95,0.99, 1.0, 1.01,1.1, 1.5, 2, 5, 10, 50 };
    long int num_of_Bytes;
    long int* num_array; //
    for (long int i = 0; i < 15; i++)
    {
        cout << "=========================================" << endl;
        cout << "Cache Size: " << Cache_size[i] << "*M" << endl;

        startTime = clock();
        num_of_Bytes = abs((long int)(Cache_size[i] * (freeBytes)));
        long int size = num_of_Bytes / sizeof(long int);
        num_array = new long int[size];
        GlobalMemoryStatusEx(&MemoryInfo);
        cout << "Available Physical Memory: " << MemoryInfo.ullAvailPhys / DIV << endl;
        cout << "Available Page File: " << MemoryInfo.ullAvailPageFile / DIV << endl;
        cout << "Available Virtual Memory: " << MemoryInfo.ullAvailVirtual / DIV << endl;


        for (long int i = 0; i < size; i++)
        {
            num_array[i] = i;
        }
        for (long int i = 0; i < size; i++)
        {
            num_array[i] += i;
        }
        delete[] num_array;
        cout << "Time elapsed: " << ((double)(clock() - startTime) / (double)CLOCKS_PER_SEC) << " seconds " << endl;
    }
    system("pause");
    return 0;
}