Is there any way to pass an anonymous array as an argument in C++?

If you’re using older C++ variants (pre-C++0x), then this is not allowed. The “anonymous array” you refer to is actually an initializer list. Now that C++11 is out, this can be done with the built-in initializer_list type. You theoretically can also use it as a C-style initializer list by using extern C, if your compiler parses them as C99 or later.

For example:

int main()
{
    const int* p;
    p = (const int[]){1, 2, 3};
}