Q42019: PRB: Missing Closing ")" in Macro Causes Unexpected EOF

Article: Q42019
Product(s): Microsoft C Compiler
Version(s): 6.0 6.0a 6.0ax 7.0 1.0 1.5 2.0 2
Operating System(s): 
Keyword(s): kbVC100 kbVC150 kbVC200 kbVC400 kbVC500 kbVC600
Last Modified: 25-JUL-2001

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The information in this article applies to:

- The C/C++ Compiler (CL.EXE), included with:
   - Microsoft C for MS-DOS, versions 6.0, 6.0a, 6.0ax 
   - Microsoft C for OS/2, versions 6.0, 6.0a 
   - Microsoft C/C++ for MS-DOS, version 7.0 
   - Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5 
   - Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 4.0, 5.0, 6.0 
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SYMPTOMS
========

The compiler generates one of the following errors:

  C1057 unexpected EOF in macro expansion ( missing ')'? )

  -or-

  fatal error C1057: unexpected end of file in macro expansion

CAUSE
=====

This behavior is by design. It informs the user of a syntax error.

RESOLUTION
==========

Examine the code line indicated by the compiler error. Ensure that the macro is
used properly with both opening and closing parentheses and all parameters
required.

MORE INFORMATION
================

Sample Code
-----------

The following sample code generates the error:

  /* Compile options needed: none
  */ 

  #include <stdio.h>
  #define add(wx, wy)  (wx) + (wy)

  void main( )
  {
     int i;
     i = add( 1, 2 );
     printf( "i = %d\n", i );

     i = add( 1, 2 ;             /* missing ')' */ 

     printf( "Hello World\n" );
     for( i = 0; i < 10; i++ )
     {
        printf( "i + 10 = %d\n", add( i, 10 ) );
     }
  }

Additional query words: 8.00 8.00c 9.00

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Keywords          : kbVC100 kbVC150 kbVC200 kbVC400 kbVC500 kbVC600 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : 6.0 6.0a 6.0ax 7.0 1.0 1.5 2.0 2
Issue type        : kbprb

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