HP SunSoft Pascal 4.0 Uživatelský manuál stáhnout pdf (Strana 108)

100

101

84 Pascal 4.0 User’s Guide

Using include Files

In the following example, the extern declaration for the variable global is in

the include ﬁle, inc_prog2.p, and is therefore included in both ﬁles. The

define declaration in ﬁle inc_mod2.p cancels the extern deﬁnition.

The module unit,

defvar_mod2.p, which deﬁnes

global in a define declaration

module defvar_mod2;

var

global : extern integer;

define

global;

procedure proc;

begin

writeln('From PROC : ',global);

global := global + 1;

end; { proc }

The commands to compile and

execute defvar_prog.p and

defvar_mod2.p

hostname% pc -xl defvar_prog.p defvar_mod2.p

defvar_prog.p:

defvar_mod2.p:

Linking:

hostname% a.out

From MAIN, before PROC: 1

From PROC : 1

From MAIN, after PROC : 2

1 2 ... 103 104 105 106 107 108 109 110 111 112 113 ... 332 333

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