- Pointers are variables and can be stored in arrays
- Sort a set of text lines in alphabet order:
- Each line of character array can be accessed by a pointer to its first character and pointers themselves can be stored in an array
- When two out-of-order lines have to be exchanged, the pointers in the pointer array are exchanged, not the text lines themselves
- These prevent complicated storage management and high overhead of moving the lines themselves
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