//Array Exercise: Add up #'s in an int [] array
String title = "Array Exercise: Add up #'s in an int [] array";
String author = "Tristan Szakacs";

int [] a;
int aSize = 10;

void setup()
{
  size( 400, 300);
  a = new int[aSize];
 keyPressed();
}

void draw()
{
  background(200); //Add background to redraw every frame to erase prev nums.
  //Display a[]
  show( a, aSize);
  //Compute total
  int total = sum(a, aSize);
  //Output
  text("TOTAL: " + total, width/3, height-20);
  text("To reset values press \"R\" or \"r\" ", 100, 100); // The \ allows the " to escape its meaning and be
                                                           // Written as text.
  
}

void fill( int[] p, int m ) //Dummy Parameters.
{
  for( int j = 0; j < m; ++j)
  {
    p[j] = int( random( 1, 101));
  }
}

void show( int[] p, int m)
{
 float y = 20, x = 20;
 for( int j = 0; j < m; ++j)
 {
   text( p[j], x, y);
   y += 15;
 }
}

int sum( int[] p, int m) //Walks through the array and adds the value for [j] to result then returns total result.
{
  int result = 0;
  for( int j = 0; j < m; ++j)
  {
   result += p[j];
  }
  
  return result;
}

void keyPressed()
{
  if( key == 'r' || key == 'R')
  {
    fill( a, aSize);
  }
}