5.2 Solutions

  1. The fragment prints:
    i = 7 and j = 3

    The parameters get swapped but the original arguments are left untouched. Processing uses call by value when passing arguments, so a copy of the original arguments are swapped not the original arguments themselves.

  2. a) is invalid, first argument must be an int (0.5 is a float)
    c) is invalid, first argument must be an int (2.0 is a float)
    f) is invalid, first argument must be an int (3L is a long)
  3.  
    void square(int x, int y, int len)
{
   rect(x, y, len, len);
}
    1.  
      void printRect (char c, int w, int h)
{
   for (int i = 1; i <= h; i++)
   {
      for (int j = 1; j <= w; j++)
         print(c);
      println();
   }
}
    2.  
      void printRect (char c, int w, int h)
{
   for (int i = 1; i <= h; i++)
   {
      for (int j = 1; j <= w; j++)
         if (i == 1 || i == h || j == 1 || j == w)
            print(c);
         else
            print(" ");
      println();
   }
}