Микроконтроллеры

ИМХО смотри UNION вот, списал: "A union is similar to a struct, except it allows you to define variables that share storage space. For example, union int_or_long{ int i; long l; } a_number Unlike a struct, the variables a_number.i and a_nymber.l occupy the same location in memory." Borland C++ version 3.1 1990.