Chapter 6More about Program Structure
- What a pointer to a function is
- How to define and use pointers to functions
- How to define and use arrays of pointers to functions
- What an exception is and how to write exception handlers that deal with them
- How to write multiple functions with a single name to handle different kinds of data automatically
- What function templates are and how to define and use them
- How to write a substantial program using several functions
You can find the wrox.com code downloads for this chapter on the Download Code tab at www.wrox.com/go/beginningvisualc. The code is in the Chapter 6 download and individually named according to the names throughout the chapter.
POINTERS TO FUNCTIONS
A pointer stores an address value that up to now has been the address of another variable. This has provided considerable flexibility in allowing you to use different variables at different times through a single pointer. A pointer can also store the address of a function. This enables you to call a function through a pointer, which will be the function at the address that was last assigned to the pointer.
Obviously, a pointer to a function must contain the address of the function that you want to call. To work properly, the pointer must also maintain information about the parameter list for the function it points to, as well as the return type. Therefore, the type for a pointer to a function must ...
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