How do pointer to pointers work in C?

Question

How do pointers to pointers work in C? When would you use them?

Answer 1

A pointer to a pointer is also called a handle. One usage for it is often when an object can be moved in memory or removed. One is often responsible to lock and unlock the usage of the object so it will not be moved when accessing it.

It's often used in memory restricted environment, ie the Palm OS.

computer.howstuffworks.com Link>>

www.flippinbits.com Link>>