C++ code - 12 lines

Link:

C++, pasted on Feb 1:

#include <iostream>

enum {
    A,
    B,,,
    C
};

int main()
{
    std::cout << A << " " << B << " " << C << std::endl;
}

Output:

1 2	Line 5: error: expected identifier before ',' token compilation terminated due to -Wfatal-errors.