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Index › Programming Questions & Help › Programs › bug I'm pretty sure it wasn't a month ago..

beginner_processing YaBB Newbies Offline Posts: 41

bug I'm pretty sure it wasn't a month ago..? May 15th, 2010, 12:30pm   Code: void setup() { size(500,500); smooth(); background(255); } void draw() { kurve(2,3,4); } void kurve(a,b,c) { noFill(); translate(250,250); stroke(0); beginShape(); for (float x=-250;x<250;x++) { vertex(x,-a*x*x-b*x-c); } endShape(); return(); } I'm pretty sure it worked a month ago, but now there's the message: expecting IDENT, found "," what's the matter?

amnonP5 YaBB Newbies Offline Posts: 35

Re: bug I'm pretty sure it wasn't a month ago..? Reply #1 - May 15th, 2010, 1:05pm   1. Declare the datatype of the variables in your function (for example int or float) 2. Functions declared with void can't return values and shouldn't include a return value. See the reference. Also, if you want to use this function more than once consider adding translate(-250,-250); at the end. Otherwise it works cumulatively. Code: void setup() {  size(500,500);  smooth();  background(255); } void draw() {  kurve(2,3,4); } void kurve(int a, int b, int c) { noFill(); translate(250,250); stroke(0); beginShape(); for (float x=-250;x<250;x++) {  vertex(x,-a*x*x-b*x-c); } endShape(); }

beginner_processing YaBB Newbies Offline Posts: 41	Re: bug I'm pretty sure it wasn't a month ago..? Reply #2 - May 15th, 2010, 1:19pm   thank you.   how stupid.. I should know that