Why can't I create an array with size determined by a global variable?

Question

Why does the array a not get initialized by global variable size?

#include

int size = 5;

int main()
{
    int a[si         


        

Answer 1

The compiler cannot assume that the value of size is still 5 by the time main() gets control. If you want a true constant in an old-style C project, use:

#define size 5