Allocate Memory for Arrays

Section 21.3 Allocate Memory for Arrays

We can extend the use of malloc() beyond single variables and use it to reserve memory for an entire array!

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Check Your Understanding Check Your Understanding

1.

Suppose you would like to reserve space in memory for an array of N integers (where N is a variable of type int that holds the number of ints to be stored) and store the resulting location in an integer pointer (an int *)

array

that has already been declared. What is the correct way to do so?

```
array = (int *) malloc(N*sizeof(int));
```
Correct
```
array = (int *) malloc(N*int);
```
Not quite. Try again!
```
N = (int *) malloc(array*sizeof(int));
```
Not quite. Try again!
```
(int *) array = N*malloc(sizeof(int));
```
Not quite. Try again!

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