Declaration includes element type, array name, and size (maximum number of elements). Array elements occupy contiguous memory locations.
An array can be initialised at declaration with
size declared as the same size of the array assigned to it a[3] = {0, 1, 2}
size not declared a[] = {0, 1, 2}
size declared as a bigger size a[4] = {0, 1, 2}
Incorrect initialisations/assignments
when there are excess elements a[1] = {1, 2}
when the array is declared, then initialised in a different statement. a[1]; a = {0};
this also means that an array cannot be reassigned to another array a[2]; b[2] = a;
Pointers
The array name refers to the address of the first element in the array.
Example
Given the array int a[3];, a is a memory address. a is equivalent to &a[0].
Cloning an array
Write a loop assigning the element of each array to the other array consecutively
memcpy from <string.h> (not covered in module)
Array as a function parameter
For prototypes, it is fine to just specify the [ ]after the datatype to signify that it is an array.
Example
int function(int []); // (name can be added, not compulsory)
In the function header, the number within the square brackets is ignored, so the array size should be provided through another parameter (int arr[], int size)
Alternatively, as an array is a pointer, the alternative syntax is as such:
prototype: int function (int *)
header: int function (int *array)
Modification
As an array is passed in through pointers, whether intentional, the function can modify the content of the array passed into it.
