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

• 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

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

/* 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

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