HP SunSoft Pascal 4.0 - Manual (Page 135)

The C–Pascal Interface 111
6
Pascal intset Type
The Pascal intset type is predefined as set of [0..127] . A variable of
this type takes 16 bytes of storage.
The Pascal procedure,
IntSetVar.p , which has an
intset of the elements
[1, 3, 7, 8]
procedure IntSetVar(var s: intset);
begin
s := [1, 3, 7, 8]
end; { IntSetVar }
The C main program,
IntSetVarMain.c
#include
extern void IntSetVar(unsigned int *);
int main(void)
{
int w ;
unsigned int *p, *s ;
s = (unsigned int *) malloc(16);
IntSetVar(s) ;
for (w = 0, p = s ; w < 4 ; w++, p++)
printf("%012o %3d \n", *p, w);
printf(" 110 001 010 (binary, word 4) \n");
printf(" 876 543 210 (bits, word 4)" \n");
}
The commands to compile and
execute
IntSetVar.p and
IntSetVarMain.c . The
output of this example depends
on the architecture of your
machine.
hostname% pc -c IntSetVar.p
hostname% cc IntSetVar.o IntSetVarMain.c -lpc
hostname% a.out
000000000000 0
000000000000 1
000000000000 2
000000000612 3
110 001 010 (binary, word 4)
876 543 210 (bits, word 4)