Accessing unallocated memory C++

Question

I am having this piece of code:

try
{
    int* myTestArray = new int[2];

    myTestArray[4] = 54;

    cout << \"Should throw ex \"  << myTestAr         


        

Answer 1

You can write out of array range, but it is not guaranteed to work, and the data is not guaranteed to be persistent there, as something else can overwrite it.

It's simply not a good idea, and since there's no exception, potentially hard to find bug.

When reading that memory, you will be pulling some random garbage that was there left over from some other program or whatever used the memory before, so it can really be anything.