Having an int I and number if iterations and a function DrawPoint(x,y) how to draw a circle?

Question

So we have a function DrawPoint(x,y) that draws a point, we have to draw some number of points that would look like a circle. How to create such for(i=0; i<numberOfIterations; i++) to draw a circle?

Answer 1

// (cx, cy) is the center of the circle
// r is the circle radius
// the smaller the granularity, the better the circle will look
// to draw only numberOfIterations points, granularity 
// should be 2*pi / numberOfIterations

for(i=0; i<2*pi; i+=granularity)    
    DrawPoint(cx + r*sin(i), cy + r*cos(i));