Drawing a circle without floating point ops.

Write a routine to draw a circle given a center coordiante (x,y) and a radius (r) without making use of any floating point computations

              |
         x    |
         |\   |
         | \r |
        j|  \ |
         |   \|
    ----------\---------
           i  |
              |
              |
              |
              |


// make use of pythoragus theorm

DrawCircle( Point origin, size_t radius )
{
    for ( int x = (origin.x - radius) ; x <= (origin.x) ; x++ )
        for ( int y = (origin.y - radius) ; y <= (origin.y) ; y++ )
            if ( pow(i,2) + pow (j,2) == pow{r,2) )
            {
                // Set the pixels symmetrically.
                SetPixel(i,j);
                SetPixel(origin.x + i, j);
                SetPixel(i,origin.y + j);
                SetPixel(origin.x + i, origin.y + j);
            }
}