HP SunSoft Pascal 4.0 Manuale Utente Scaricare il pdf (Pagina 140)

100

101

116 Pascal 4.0 User’s Guide

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");

}

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HP SunSoft Pascal 4.0 Manuale Utente Pagina 140

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