What should I do when there is not enough memory to run my program in C?

Question

Possible Duplicate:
How can I allocate a 2D array using double pointers?

I used VB 2012 Express to make a maze program.

It works really well even when I set ROW*COLUMN to 499*499, (the maze is an array: unsigned char maze[ROW][COLUMN]).

But one time I tried to make a super-giant maze of999*999, and the compiler gave me a "stack overflow" error.

I do know what it means, but is there any way to assign extra memory or even use some disk space to run my program?

You're not out of memory. You're just out of stack. – Mysticial Dec 16 '12 at 09:14 — Mysticial, Dec 16 '12 at 09:14

score 2 · Accepted Answer · edited May 23 '17 at 11:43

2

You are allocating maze on the stack, and stack size is typically limited to between 1 and 8 megabytes. To overcome this limitation, allocate maze on the heap.

For suggestions on how to do this, see How can I allocate a 2D array using double pointers? and Heap allocate a 2D array (not array of pointers)

edited May 23 '17 at 11:43

Community

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answered Dec 16 '12 at 09:15

NPE

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thx. so what should i do to an object in a class? – user1907570 Dec 22 '12 at 13:03

score 2 · Answer 2 · edited Dec 16 '12 at 12:03

2

You can either dynamically allocate your array (e.g maze = new char[ROW*COLUMN]) or allocate it globally (outside function scope), like

#define ROW 999
#define COLUMN 999

unsigned char maze[ROW][COLUMN];

int main(void)
{

}

edited Dec 16 '12 at 12:03

Bo Persson

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answered Dec 16 '12 at 10:10

arash kordi

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What should I do when there is not enough memory to run my program in C?

2 Answers2