HP SunSoft Pascal 4.0 - Manual (Page 122)

98 Pascal 4.0 User’s Guide
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Although it does not apply in this example, arrays of aggregates in Pascal
have, by default, a size that is always a multiple of four bytes. When you use
the
-calign option to compile the Pascal code, that difference with C is
eliminated.
The following example illustrates this point. The string 'Sunday' only gets
through to the C main program when you compile the Pascal routine using
-calign .
The Pascal procedure,
FixVec.p
type
VecTyp = array [0..8] of integer;
procedure FixVec(var V: TVec; var Sum: integer);
var
i: integer;
begin
Sum := 0;
for i := 0 to 8 do
Sum := Sum + V[i]
end; { FixVec }
The C main program,
FixVecMain.c
#include <stdio.h>
extern void FixVec(int [], int *);
int main(void)
{
int Sum;
static int a[] = {0,1,2,3,4,5,6,7,8};
FixVec(a, &Sum);
printf(" %d \n", Sum);
}
The commands to compile and
execute
FixVec.p and
FixVecMain.c
hostname% pc -c -calign FixVec.p
hostname% cc FixVec.o FixVecMain.c -lpc
hostname% a.out
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