PRB: Missing Closing ")" in Macro Causes Unexpected EOF (42019)

SUMMARY

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

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

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 ) );
   }
}