CCS C Compiler Manual PCB / PCM / PCH

Data Definitions
Structures and Unions
Struct structure type: creates a collection of one or more
variables, possibly of different types, grouped together as a
single unit.
struct[*] [id] {
type-qualifier [*] id [:bits]; } [id]
One or more,
semi-colon
separated
Zero
or more
For example:
struct data_record {
int a[2];
int b : 2; /*2 bits */
int
c : 3; /*3 bits*/
int d;
} data_var; //data_record is a structure type
//data_var is a variable
Union type: holds objects of different types and sizes, with the
compiler keeping track of size and alignment requirements. They
provide a way to manipulate different kinds of data in a single
area of storage.
union[*] [id] { type-qualifier [*] id [:bits]; } [id]
One or more,
semi-colon
separated
Zero
or more
For example:
union u_tab {
int ival;
long lval;
float fval;
}; //u_tag is a union type that can hold a float
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