Arrays

An array is an ordered set of data objects of the same type.

Declaration:

int numbers[10]; /* Declare numbers[0] to numbers[9]. */

• no array-bounds checking!

Example:

for (i = 0; i < 10; i++) counts[i] = 0; /* Initialise the array (else garbage). */

• C stores arrays in consecutive locations in storage;
• pointers may be used to access arrays;
• the array name by itself is a synonym for the address of the first element of the array;

Example:

int a[4] = {10, 20, 30, 40}; int *pa; printf("%d\n", a[0]); /* print the first element of a*/ pa = &a[0]; printf("%x\n", pa); /* prints the address of the first */ /* element of a */ pa = a; printf("%x\n",pa); /* also prints the address of the */ /* first element of a */