This section shows how to declare a nested structure in HP
C, HP Pascal, and HP FORTRAN 77.
HP C Nested Structure
struct x {    char y [3];    short z;    char w [5]; };   struct q {    char n;    struct x v [2];    double u;    char t; } a;   struct u{    union {       int x;       char y[4];    } uval; }; | 
HP Pascal Nested Structure
TYPE    x = RECORD        y : PACKED ARRAY [1 .. 3] OF CHAR;        z : SHORTINT;        w : PACKED ARRAY [1 .. 5] OF CHAR;        END;      q = RECORD        n : CHAR;        v : PACKED ARRAY [1 .. 2] OF x;        u : LONGREAL;        t : CHAR;        END;      u = RECORD         CASE         Boolean OF           TRUE : (x : INTEGER);           FALSE: (y : ARRAY[1..4] of CHAR);        END; VAR a:q;  | 
HP FORTRAN 77 Nested Structure
program main structure /x/         character*3 y         integer*2 z         character*5 w end structure   structure /q/         character n         record /x/ v(2)         real*8 u         character t end structure     structure /u/         union                 map                     integer*4 x                 end map                 map                     character*4 y                 end map         end union end structure  |