HP SunSoft Pascal 4.0 Manual do Utilizador descarregar pdf (Página 272)

248 Pascal 4.0 User’s Guide

A

Example

The Pascal program,

config.p, which deﬁnes the

conditional variables one and

two

program config_example(output);

{ This program demonstrates the use of the

%config compiler directive. }

var

a: integer := maxint;

b: integer := minint;

%var one two

begin

writeln('Begin program.');

%if one %then

writeln('One is defined as ', a:2, '.');

%elseif two %then

writeln('Two is defined as ', b:2, '.');

%elseif %config %then

writeln('Nothing is defined.');

%endif

writeln('End program.')

end. { config_example }

The output when you compile

config.p without the

-config option

hostname% pc -xl config.p

hostname% a.out

Begin program.

End program.

The output when you deﬁne the

variable one

hostname% pc -xl -config one config.p

hostname% a.out

Begin program.

One is defined as 32767.

End program.

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