CS162 - Prepare for Midterm

1
CS162 - Prepare for Midterm

• Review for the Midterm
• Programming Assignment Discussion
• Questions?
• Midterm is next time

2
CS162 - Topics

• The midterm will cover the following topics
• function arguments --reference vs. value
• structures and arrays of structures
• classes constructors, destructors, class
  interface versus class implementation, member
  functions, data members
• pointers defining pointer variables, allocating
  and deallocating memory

3
CS162 - Review Questions

• Given the following class
• class name
• public
• name()
• name(char s)
• int assign(char s)
• void display()
• private
• char str10

4
CS162 - Review Questions

• Implement the code for
• the constructors
• the display function
• the assign function
• Change this class
• to support a first, middle initial, and last name
  using structures
• Change the class to
• allocate the memory for str dynamically using new
  and pointers

5
CS162 - Review Questions

• Why are pointers useful?
• What are pointers?
• Why would we pass a pointer to a function by
  reference?
• What does it mean to dereference a pointer
  variable?
• What does it mean to deallocate dynamic memory?

6
CS162 - Review Questions

• Show how youd pass a video structure to a
  function
• by value
• by reference
• as an array of videos
• as a pointer, by value
• as a pointer, by reference

7
CS162 - Review Questions

• When do we need to dereference a pointer variable
• Explain how it is possible to establish (set) the
  size of an array at run time
• What is the purpose of a constructor?
• What is the purpose of the destructor?
• What is the difference between a class instance,
  a class member, and an object

8
CS162 - Review Questions

• Show how you would allocate an array of five
  characters dynamically
• Show how you would deallocate such an array
• What is the difference between
• variable.member
• (variable).member
• variable-gtmember

9
CS162 - Midterm

• Questions?