1  void f(int i, int j, int radius, int width, int N)
2  {
3    const int diff   = i-radius;
4    const int lowk   = (diff>0 ? diff : 0 );
5    int k;
6
7    for(k=lowk; k<= 2; k++){
8      int idx = ((k-i+radius)*width-j+radius);
9      if (idx < 0)
10	abort ();
11    }
12
13    for(k=lowk; k<= 2; k++);
14  }
15
16
17  int main(int argc, char **argv)
18  {
19    int exc_rad=2;
20    int N=8;
21    int i;
22    for(i=1; i<4; i++)
23      f(i,1,exc_rad,2*exc_rad + 1, N);
24    exit (0);
25  }
26
27