compiler-warning-level-1-c4003.md

description	title	ms.date	f1_keywords	helpviewer_keywords
Learn more about: Compiler Warning (level 1, Error) C4003	Compiler Warning (level 1, Error) C4003	11/04/2016	C4003	C4003

Compiler Warning (level 1, Error) C4003

not enough arguments for function-like macro invocation 'identifier'

The number of formal parameters in the macro definition exceeds the number of actual parameters in the macro. Macro expansion substitutes empty text for the missing parameters.

The following sample generates C4003:

// C4003.cpp
// compile with: /WX
#define test(a,b) (a+b)

int main()
{
   int a = 1;
   int b = 2;
   a = test(b);   // C4003
   // try..
   a = test(a,b);
}