Page 74 - DCAP201_FUNDAMENTALS_OF_DATA_STRUCTURES

Unit 5: Pointers

We can legally do name[3][4] and Aname[3][4] in C. Notes
However
Aname is a true 200 element 2D char array.

access elements via
20*row + col + base_address
in memory.
name has 10 pointer elements.

Did u know? If each pointer in name is set to point to a 20 element array then and only then
will 200 chars be set aside (+ 10 elements).

The advantage of the latter is that each pointer can point to arrays be of different length.
Consider:
char *name[] = { “no month”, “jan”,
“feb”, ... };
char Aname[][15] = { “no month”, “jan”,
“feb”, ... };

Figure 5.5: 2D Arrays and Arrays of Pointers

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