Declare large array on Stack

Question

I am using Dev C++ to write a simulation program. For it, I need to declare a single dimensional array with the data type double. It contains 4200000

Answer 1

Are there any reasons you want this on the stack specifically?

I'm asking because the following will give you a construct that can be used in a similar way (especially accessing values using array[index]), but it is a lot less limited in size (total max size depending on 32bit/64bit memory model and available memory (RAM and swap memory)) because it is allocated from the heap.

int arraysize= 4200000;
int *heaparray= new int[arraysize];

... 

k= heaparray[456];

...

delete [] heaparray;

return;