What does this error mean?

[blueeyedlion]

I tried to compile a program including this header file with g++:

#ifndef TEST_H
#define TEST_H

int double (int);

#endif 

Then I got this:

In file included from test.cpp:2:0:
test.h:4:13: error: expected uqualified-id before 'int'
test.h:4:13: error: expected ')' before 'int'

There's not much I could have done wrong. What happened?

[PanGalactic]

double is a type but you are using it as a function name (I think).

[blueeyedlion]

Yes, that's probably it. Thanks.