HP SunSoft Pascal 4.0 Uživatelský manuál stáhnout pdf (Strana 132)

100

101

108 Pascal 4.0 User’s Guide

When you compile the Pascal routine without using the -calign option, the

program does not work correctly.

Variant Records

C equivalents of variant records can sometimes be constructed, although there

is some variation with architecture and sometimes a need to adjust alignment.

You can avoid the need to adjust alignment by using the -calign option.

The commands to compile and

execute DayWeather.p and

DayWeatherMain.c

without

-calign

hostname% pc -c DayWeather.p

hostname% cc DayWeather.o DayWeatherMain.c -lpc

hostname% a.out

day = ''

weather = ' sun'

The commands to compile and

execute DayWeather.p and

DayWeatherMain.c

with

-calign

hostname% pc -calign -c DayWeather.p

hostname% cc DayWeather.o DayWeatherMain.c -lpc

hostname% a.out

day = 'Sunday'

weather = 'sunny'

The Pascal procedure,

VarRec.p

type

vr = record

case tag: char of

'a': (ch1, ch2: char);

'b': (flag: boolean);

'K': (ALIGN: integer);

end;

procedure VarRec(var x: vr);

begin

if x.ch1 = 'a' then

x.ch2 := 'Z'

end; { VarRec }

1 2 ... 127 128 129 130 131 132 133 134 135 136 137 ... 332 333

Komentáře k této Příručce

Žádné komentáře

HP SunSoft Pascal 4.0 Uživatelský manuál Strana 132

Komentáře k této Příručce

Související produkty a manuály pro Software HP SunSoft Pascal 4.0