21.4. Introduction to Arrays

21.4. Introduction to Arrays
	Chapter 21. Memory Access

[ fromfile: memoryaccess.xml id: arrays ]

int a[10]; // explicitly creates uninitialized cells a[0], a[1],..., a[9]
int b[] = {1,3,5,7}; // implicitly creates and initializes b[0],..., b[3]

The array name is an alias for a const typed pointer to the first cell of the array.
There is no automatic default initialization of pointer variables.

Array indices are relative offsets from the base address:
```
 a[k] is equivalent to *(a + k) 
```

There is a special syntax for defining a dynamic array consisting of a given number of elements of some type.
```
   uint n;
   ArrayType* pt;
   pt = new ArrayType[n];
```
Each element of the newly allocated array is given default initialization.
To properly deallocate this array, it is necessary to use the syntax:
```
delete[] pt;
```

We discuss exceptions and what happens when a request for dynamic memory cannot be fulfilled by the system in a separate article^[86] in our dist directory.

^[86]articles/exceptions.html


21.3. Memory Access Summary		21.5. Pointer Arithmetic