#include <iostream>

// standard section [9.1]. "If a class name is declared in a scope
// where an object, function, or enumerator of the same name is also
// declared, then when both declarations are in scope, the class can be
// referred to only using an elaborated-type specifier" 

class C 
{
    int d[3];
};

int C;

int main()
{
   std::cout << "sizeof(C)\t"       << sizeof(C)        << std::endl;
   std::cout << "sizeof(class C)\t" << sizeof(class C)  << std::endl;
}