HP SunSoft Pascal 4.0 - Manual (Page 128)

104 Pascal 4.0 User’s Guide
6
If wc is the width of the smallest element, as determined by sizeof() , then
the width of the next largest element is the number of those smaller elements
in the next larger element multiplied by
wc .
width of next largest element = (ub - lb + 1) * wc
In general, ( lb , ub , wc ) are the bounds and element width of the next lower
dimension of the array. This definition is recursive.
Example 3: Array of Characters
The commands to compile and
execute
RealCA.p and
RealCAMain.c with -calign
hostname% pc -c -calign RealCA.p
hostname% cc RealCA.o RealCAMain.c -lpc
hostname% a.out
1.0 0.0 0.0
0.0 1.0 0.0
The Pascal procedure,
ChrCAVar.p
procedure ChrCAVar(var a: array [lb..ub: integer] of char);
begin
a[0] := 'T';
a[13] := 'o';
end; { ChrCAVar }
The C main program,
ChrCAVarMain.c . For C, the
lower bound is always 0.
#include <stdio.h>
extern void ChrCAVar(char [], int, int);
int main(void)
{
static char s[] = "this is a string" ;
ChrCAVar( s, 0, sizeof(s)-1) ; /*(s, lower, upper)*/
printf("%11s \n", s) ;
}