Compiler Error C2081

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at Compiler Error C2081.

identifier' : name in formal parameter list illegal

The identifier caused a syntax error.

This error can be caused by using the old style for the formal parameter list. You must specify the type of formal parameters in the formal parameter list.

The following sample generates C2081:

// C2081.c  
void func( int i, j ) {}  // C2081, no type specified for j  

Possible resolution:

// C2081b.c  
// compile with: /c  
void func( int i, int j ) {}