Почему VC2005 медленнее D?

#include <cstdio>

/**
 * outputs given line of pascal triangle with center alignment. Offset is calculated using two variables: n - triangle's size and k - current line's length
 */
void output (int * line, int n, int k)
{
    for (int i = 0; line != 0 && i < n; ++i)
    {
        printf ("%d ", num);
    }
        printf ("\n");
}

int main ()
{
    int n; /// size of pascal triangle to build
    int * line; /// current pascal triangle line
   
    // get triangle's size and init accordingly
    scanf ("%d", &n);
    line = new int[n];
   
    // build first line as a basis
    line[0] = 1;
    output (line, n, 1);
   
    // build and output pascal triangle line by line
    for (int k = 2; k <= n; ++k)
    {
        int prev = 1;
        for (int i = 1; i < k; ++i)
        {
            int temp = line;
            line += prev;
            prev = temp;
        }
        output (line, n, k);
    }
   
        delete [] line;
    return 0;
}