positioning pie slice problems

Because I really don’t understand Turbo C++ I can’t say for sure. But I think this is your solution:

void Circular_arc(constint h, constint k, constint r, constint start_angle, constint end_angle)
{
    static int offset = 0;

    start_angle = (start_angle + offset) % 360;
    end_angle = (end_angle + offset) % 360;
    offset = end_angle;

    int color = getcolor();

    float angle = (((start_angle <= end_angle) ? start_angle : end_angle)*(M_PI / 180));
    float range = (((end_angle > start_angle) ? end_angle : start_angle)*(M_PI / 180));

    float x = (r*cos(angle));
    float y = (r*sin(angle));

    do
    {
        putpixel((int)(h + x + 0.5), (int)(k - y + 0.5), color);

        angle += 0.001;

        x = (r*cos(angle));
        y = (r*sin(angle));
    } while (angle <= range);
}

Let me also say that this is a horrible solution in that it is in no way object oriented. But it seems to be the best you can do without starting over (which you should do.)