Using Compiler Directives

[abombss]

I am trying build my project, and I am getting linking errors.&nbsp;&nbsp;The problem is with my compiler directives and include files.&nbsp;&nbsp;Here are the headers for my project.<br><br>// assign10.cpp<br>#include &lt;fstream&gt;<br>#include &lt;iostream&gt;<br>#include &lt;string&gt;<br>#include &quot;classdef.cpp&quot;<br>using namespace std;<br><br>//classdef.h<br>#pragma once<br>#include &lt;fstream&gt;<br>#include &lt;iostream&gt;<br>#include &lt;string&gt;<br>using namespace std;<br>//CODE FOR CLASS DEFINITIONS<br>#include &quot;classdef.cpp&quot;<br><br>//classdef.cpp<br>#ifndef _CLASSDEF_<br>#define _CLASSDEF_<br>//CODE FOR CLASS IMPLMENTATION<br>#endif<br><br>I have tried numerous of other combinations and nothing seems to work.&nbsp;&nbsp;Every time the things in the classdef.cpp get redefined.&nbsp;&nbsp;If any could help let please let me know.<br>

 

[ssingh]

To prevent multiple inclusion or redefintion of variables from a header file. Just do like<br><br>In the header file ,put this kind of code:<br><br>#ifndef SSINGH<br>#define SSINGH<br><br>// WRITE YOUR WHOLE HEADER FILE'S CONTENT.......<br><br>..............<br>...........<br><br>#endif.<br><br>This should be your header file's content , which will prevent&nbsp;&nbsp;redefinition of the variables.<br><br>Does it solve your problem?<br>Thanx<br>Siddhartha Singh<br><A HREF="mailto:ssingh@aztecsoft.com">ssingh@aztecsoft.com</A><br><br>

 

[TomMcL2]

also get rid of this line<br>#include &quot;classdef.cpp&quot;.<br>you should never include a source file<br><br>//ex HEADER FILE<br>&nbsp;#ifndef _HEADER_NAME<br>&nbsp;#define _HEADER_NAME<br>&nbsp;put includes here...<br><br>&nbsp;#endif<br><br><br>//SOURCE FILE<br>#include &quot;headerFile.h&quot;<br>put source here...