hello. I new to code... something simple I do not quite understand.

How come you call a function before it has been declared. For example :

-----------

void setup()
{
 size(200, 200);
 background(51);
 noStroke();
 smooth();
 noLoop();
}

void draw()
{
 draw_target(68, 34, 200, 10);
 draw_target(152, 16, 100, 3);
 draw_target(100, 144, 80, 5);
}

void draw_target(int xloc, int yloc, int size, int num)
{
 float grayvalues = 255/num;
 float steps = size/num;
 for(int i=0; i<num; i++) {
   fill(i*grayvalues);
   ellipse(xloc, yloc, size-i*steps, size-i*steps);
 }
}


-----


When the draw function is called it in turn calls the draw_target function which is parsed the arguments 68, 34, 200, 10 etc. The function is then declared below. But how can we call a function before it has been declared. I don't understand? Sorry. Thank you

aha!

Simple.

Thank you so much.

learncoder wrote on Mar 27^th, 2008, 1:05pm:


Yes, that is possible. Although I'm not sure, if it makes a lot of sense, since you'll have to scroll past the functions every time you want to get to the main part of the code.

What I often do, is to put all the supporting functions into an entirely new tab. This way you can keep the main part of the code you're constantly working on separate from the parts which you write once and don't need to edit any more.