4.1 Parameter-less Methods
  4.1.1 Without Returned Value (Procedure)
  4.1.2 With Returned Value (Function)
 4.2 Two Views of Methods
 4.3 Call-by-Value Parameters
 4.4 Call-by-Reference Parameters
 4.5 Call-by-Pointer Parameters
 4.6 Overloaded Methods
 4.7 Declarations
 Assignment 3: ASCII Art (Due: Th, April 24)