An example class

• I am working on a program that will require fractions.
• So I have decided to make a fraction class.
• What are is the domain of a fraction?
  • An integer numerator
  • A non-zero integer denominator.
  • A possible sign
• What are the operations on a fraction?
  • Likely Observers
    • Get the numerator
    • Get the denominator.
    • Get a decimal equivalent
  • Likely Transformers
    • Set the value (numerator, denominator)
  • Others
    • A constructor that sets the value to be +, 0, 1
  • Others
    • Math functions (add, subtract, multiply, divide)
• The standard library has gcd and lcm functions.
  • Need to include algorithm
  • We will use these for now.
• The class needs to make sure that the denominator is never 0.
• The class declaration goes in FractionT.h
• The class implementation goes in FractionT.cpp
• We will need to put member functions in scope with the class scope operator in the implementation file.
  • classname::function
  • type classname::function
• Constructors are declared
  • As a function with the class name as its name.
  • With no return type.
  • FractionT::FractionT();
• We will not need a destructor for this code.