Why is this crashing both CodeBlocks and VisualStudio?

[Niscuit]

It keeps giving me a runtime error.

#include<iostream>
#include<vector>
#include<string>
#include <cstring>

using namespace std;

int main()
{
	int *myArray =NULL; //Declares pointer
	int size;
	cout << "How big is your array?" << endl;
	cin >> size;
	myArray[size];
	for (int index = 0; index < size; index++)
	{
		myArray[index] = index;
		cout << myArray[index] << endl;
	}
	cout << *myArray << endl;
	cout << *(myArray + 2) << endl;


	return 0;

[Peter87]

Line 14 is not how you allocate an array. If you want to dynamically allocate an array you should use the new keyword.

myArray = new int[size];

If you use new to allocate memory you should also not forget to delete it when you are finished using it.

delete[] myArray;

Note that the [] are necessary when deleting arrays.

[kevinkjt2000]

The solution here is to allocate memory to be able to store these numbers. It looks like your tried this on line 14, but that line should look like myArray = new int[size];. Allso, do not forget to call delete[] myArray; when you are finished using this dynamically allocated memory.

[Niscuit]

Thank you!