Structures
Structures allow you to organize information to increase the overall clarity of your code. Much like a structure in C, these are collections of variables and their values, placed under one name.
The use of a structure is illustrated by the following example:
Mod()
[
Dims STRUCT[
LENGTH;
WIDTH;
HEIGHT;
];
]
Main
[
…
]
An instance of the structure Dims can now be assigned to a variable as follows:
A = Dims();
You can also assign values to the various nodes in the same statement:
A = Dims(15, 30, 45);
In either, the variable A will now contain an array that is 3 items long and that can be indexed using the keywords Length, Width and Height as defined in the structure. In effect, Length is taken to mean "index 0 of the array stored in A", Width will mean "index 1 of the array stored in A", etc.
The values can now be used as shown in the following examples:
Example 1:
Rval = A\Width;
Rval now holds the value 30.
Example 2:
A\Length = 42;
42 is now the value stored in index position 0 of our structure.
You can also use array indexing notation to access the underlying data:
A[1] == 30;
The Theory Behind Structures