More questions about constants

**CornedBee** · 01-03-2008

You could disassemble the executable. But what for? To find out whether you have 4 more bytes in the static section?

Here's something you can try with only generating assembly:

Code:

#include <iostream>

const int CON = 100;

int main()
{
	std::cout << CON << '\n';
}

Enable optimizations and find CON in the assembly output. (I tried this with GCC 3.4.4 and -O2)

As long as you treat constants as constants and not as variables (e.g. take the address), they won't even be emitted. Size requirement: zero. Whereas if they're extern, they always need the space.