We can have arrays of pointers since pointers are variables.
Example use: Sort lines of text of different length.
Note: Text can't be moved or compared in a single operation.
Arrays of Pointers are a data representation that will cope
efficiently and conveniently with variable length text lines.
How can we do this: Store lines end-to-end in one big char
array n will delimit lines.
Store pointers in a different array where each pointer
points to 1st char of each new line.
Compare two lines using strcmp () standard library function.
If 2 lines are out of order swap pointer in pointer array (not text).
