String author=  "Joshua Jack";
int[] z= {6, 5 , 3 , 4 , 1 ,9 ,2 ,7};
int many= z.length;

void setup() {
  size ( 500,400 );
}

void draw() {
  background( 200,0,150 );
  fill(120,0,0);
  textSize(17);
  int next=21;  
  float x=45, y=45;
  for (int j=0; j<many; j++) {
    text( z[j], x, y );
    y +=next;
  }
  
   y += next;
  int total=  sum( z, many );
  float avg=  float(total) / many;  
  text( "The total is:      "+total, 100, y );
  y += next;
  text( "The average is:  "+avg, 100, y );
  //// Title, etc..
  textSize(20);
  textSize(12);
  text( author, 20, height-20 );
}

//// Return the sum total ////
int sum( int a[], int m ) {
  int result=0;
  for (int j=0; j<m; j++ ) {
    result += a[j];
  }
  return result;
}

void keyPressed() {
  if (key == 'q') exit();
  else if (key == 'b') highest( z, many );
  else if (key == 's') small( z, many );
  else if (key == 'o') order( z, many );
  //  
  else if (key == 'd') dec( z, many );
  //
  else if (key == 'r') randomize( z, many );
  else text( "NO SUCH FUNCTION:  "+key, width/2, height/2 );
}

void highest( int a[], int m ) {
  // Move the biggest number to the end of the array. 
  int w=0;
  for (int j=1; j<m; j++) {
    if (a[j] > a[w]) w=j;
  }
  swap( a, w, m-1 );
}
void swap( int p[], int a, int b ) {
  //// exchange p[a] with p[b]
  int tmp=  p[a];
  p[a]=  p[b];
  p[b]=  tmp;
}

void small( int a[], int m ) {
  // Move the smallest number to the beginning of the array 
  // (Swap, to keep all numbers.)
  int w=0;
  for (int j=1; j<m; j++) {
    if (a[j] < a[w]) w=j;
  }
  swap( a, w, 0 );
}

void dec( int a[], int m ) {
  // Decrease each of the numbers by one.
 for (int j=0; j<m; j++) {
    a[j]--;
  }
}

void randomize( int a[], int m ) {
  // Replace all numbers of random values.
 for (int j=0; j<m; j++) {
    a[j]=  int( random( 0, 20 ) );
  }
}

// Sort entire array. //
void order( int q[], int m ) {
  for (int k=m; k>1; k--) {
    highest( q, k );
  }
}