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

• The Microsoft 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, versions 1.0, 1.5 - Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0, 4.0, 5.0

SYMPTOMS

The compiler generates the following error:

   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 ) );
      }
   }