/* variable_scope.pde
   Written by Justin Hsia
   
   Demo program for variable scope, parameters, and return values.
*/
int global=0;    // global variable is accessible within all functions

void setup() {
  
}

void draw() {
  int local=5;    // local variable only exists within draw()
  println("local before addOne: " + local);
  println("global before addOne: " + global);
  addOne(local);  // this has no effect on local within draw()    
  //local = addOne(local);  // by assigning return value to local, can change value
  println("local after addOne: " + local);
  println("global after addOne: " + global);
  noLoop();
}


int addOne(int x) {
  global = global + 1;
  //println("in addOne: " + x);
  //local = local + 1;    // uncommenting this line will make Processing complain
  return x + 1;
}