NPTS
for (j = 0; j <= NPTS; j++)
for (j = 1; j < NPTS; j++)
for (j = 0; j <= NPTS; j++)
for (j = 1; j < NPTS; j++)
for (j = 0; j <= NPTS; j++)
for (j = 1; j < NPTS; j++)