HP 3000 Manuals

HP C Programmer's Guide

Array Size and Alignment 

An array's size is computed as:

   (size of array element type) * (number of elements)

For instance, the array declared below is 400 bytes (4 * 100) long:

     int arr[100];

The size of the array element type is 4 bytes and the number of elements
is 100.

Arrays are aligned on a boundary corresponding to their element type.
For example, a double array is aligned on a 8-byte boundary; and a float
array within a struct is aligned on a 4-byte boundary.

MPE/iX 5.0 Documentation