DAY 18
WEEK 3
Getting More from
Functions
As you know by now, functions are central to C programming. Today you will
learn more ways to use functions in your programs, including- Passing pointers as arguments to functions
- Passing type voidpointers as arguments
- Using functions with a variable number of arguments
- Returning a pointer from a function
Some of these topics have been mentioned earlier in this book, but today’s les-
son provides more detailed information.
Passing Pointers to Functions ............................................................................
The default method of passing an argument to a function is by value. Passing
by valuemeans that the function is passed a copy of the argument’s value. This
method has three steps:29 448201x-CH18 8/13/02 11:14 AM Page 515