HP SunSoft Pascal 4.0 - Manual (Page 140)

116 Pascal 4.0 User’s Guide
6
Input and Output
If your C main program calls a Pascal procedure that does I/O, then include
the following code in the C main program before you call the Pascal procedure:
Also, in the C main program just before exit, add the following line:
See this example:
The commands to compile and
execute
RetReal.p and
RetRealMain.c
hostname% pc -c RetReal.p
hostname% cc RetReal.o RetRealMain.c
hostname% a.out
3.000000
__PC0__PCSTART();
__PC0__PCEXIT();
The Pascal procedure, IO.p procedure IO;
begin
writeln('Hello Pascal and St. Petersburg!');
end;
The C main program, IOMain.c #include <stdio.h>
extern void IO();
int main(void)
{
IO();
printf("Hello C! \n");
}