Clarion data type equivalents

The C types are from Carl Barnes' excellent Clarion Magazine article Compiling C with the Clarion IDE, Part 1: It's Easier Than You Think.

C type	Clarion type
*	pass by address - <omittable>
&	pass by address - required
[#]	Array, use `DIM(#)`. The name of an array is actually a pointer to the first element of the array. So arrays tend to be passed by address even though you do not see an asterisk.
`char, unsigned char, signed char`	`BYTE`, but probably a string type
`char *, char[]`	`CSTRING` or `STRING` (need `RAW`). If the array has a dimension number it tends to be a fixed length string e.g. `char Digest[16]` is a `STRING(16)`. A `char ` could be a `BYTE`, but it is rare.
`struct`	`GROUP` (need `RAW`)
`unsigned short`	`USHORT`
`signed short, short`	`SHORT`
`int, signed int,` `long, signed long,` `signed`	`SIGNED` or `LONG -` `UNSIGNED` is `Equate(Long)`
`unsigned, unsigned long, unsigned int`	`ULONG` - avoid using the `ULONG` type in Clarion. The object code created for `ULONG` math uses the decimal library, which is much slower than the code used for a `LONG`. The `UNSIGNED` type is equated to a `LONG`, which is preferable.
`float`	`SREAL`
`double`	`REAL`
`void`	nothing to enter
`Void *`	This is a pointer to something. Use a `LONG` or `UNSIGNED`.