Course Web Pages

• Course Home
• C++ Basics
• Variables
• Flow Control
• For loops, strings and arrays
• File I/O and vectors
• OpenGL basics
• Iterators and Algorithms
• Functions
• Scope
• Special functions
• Classes
• Class Design and Implementation

Related Links

• C++ Language Tutorial
• Wikiversity Introduction to C++

Free eBooks

• Introduction to C Programming
• The C Book
• How to Think Like a Computer Scientist (C++ version)
• Thinking in C++

Scope

Beginning C++ Through Game Programming, by Michael Dawson.

Scoping, Part 1

 scoping.cpp

Scoping, Part 2

Global Reach, Part 1

 global_reach.cpp

Global Reach, Part 2

 global_extern.zip

Global Reach, Part 3

Exercises

These problems are from an MIT course made available through MIT's OpenCourseware

For these questions, you are encouraged to use a computer.

1. Below is a sample program. Use it to answer the following question: What happens if we declare the same name twice within a block, giving it two different meanings?
   

   Hints: Did your program compile? If so, what does it print? If not, what error message do you get?

    

2. Below is a sample program. Use it to answer the following question: What happens if we declare an variable in a block, and then redeclare that same variable in a block nested within that block?
   

   Hints: Did your program compile? If it does, what does the program output? If not, what error message does it produce?

    

3. Below is a sample program. Use it to answer the following question: Suppose a variable has two different declarations, one in an outer block and one in a nested inner block. If the name is accessed within the inner block, which declaration is used?
   

    

4. Below is a sample program. Use it to answer the following question: Suppose a variable has two different declarations, one in an outer block and one in a nested inner block. If the name is accessed within the outer block, but after the inner block, which declaration is used?
   

    

5. Below is a sample program that will not compile. Why not? By moving which line can we get the code to compile?