Sams Teach Yourself C++ in 21 Days

Understanding Pointers 253

8

5. What is the difference between the indirection operator and the address-of
   operator?


6. What is the difference between const int ptrOneand int const ptrTwo?

Exercises ........................................................................................................

1. What do these declarations do?
   a. int pOne;
   b. int vTwo;
   c. int pThree = &vTwo;


2. If you have an unsigned shortvariable named yourAge, how would you declare a
   pointer to manipulate yourAge?


3. Assign the value 50 to the variable yourAgeby using the pointer that you declared
   in Exercise 2.


4. Write a small program that declares an integer and a pointer to integer. Assign the
   address of the integer to the pointer. Use the pointer to set a value in the integer
   variable.


5. BUG BUSTERS:What is wrong with this code?
   #include
   using namespace std;
   int main()
   {
   int pInt;
   pInt = 9;
   cout << “The value at pInt: “ << pInt;
   return 0;
   }
   6.BUG BUSTERS:What is wrong with this code?
   #include
   using namespace std;
   int main()
   {
   int SomeVariable = 5;
   cout << “SomeVariable: “ << SomeVariable << endl;
   int pVar = & SomeVariable;
   pVar = 9;
   cout << “SomeVariable: “ << *pVar << endl;
   return 0;
   }