CMSC 202 Computer Science II, Spring 2007, Section 010x

Lecture 3: C++ Primer

Tuesday 02/06, 2007

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Assigned Reading:  11

Slides As Shown:

• Announcements, etc: [slide view] [print view]
• Function Overloading : [slide view] [print view]
• Scope & Lifetime : [slide view] [print view]

Topics Covered:

• Announcements:
  • TA Office Hours Posted
  • CMSC 202 Mailing List
  • Computer Science Help Center Open
  • Project 1 will be posted by noon next Monday
  • You're reading the textbook, right?

• Recapped some differences between C and C++ from last time.

• Discussed C++ References. (Slides posted last week.)
  • Note: Don't try to make sense of the & notation.
  • Simple test of references: ref1.cpp, ref1.txt
  • References used for parameter passing:Parameter Passing by Reference. Note no dereferencing in swap() function. Also, no address-of in function call. Important: C programmer would not think calling swap() would change the values of a and b.
  • Const reference parameters cannot be modified by the function called but also are not copied.

• Discussed function overloading. See slides. Some example programs.
  • Simple resolution with type: over1.cpp, over1.txt
  • Simple resolution with number: over2.cpp, over2.txt
  • Example of promotion and downcasting: over3.cpp, over3.txt
  • Ambiguous call: over4.cpp, over4.txt
  • Tricky resolution (don't do this!): over5.cpp, over5.txt
  • Do it this way, using typecasting: over6.cpp, over6.txt
  • Promoting int to double&: const1.cpp, const1.txt
  • Const& and ref: const2.cpp, const2.txt
  • Can't resolve pass by value vs pass by const ref: const3.cpp, const3.txt

• Discussed scope, lifetime and namespaces. See slides.
  • A simple example with the :: operator: namespace1.cpp, namespace1.txt
  • A simple example with "using namespace" directive: namespace2.cpp, namespace2.txt
  • A simple example with "using ...::" declaration: namespace3.cpp, namespace3.txt