View Compilation Error

0_0_10630882_8496.cpp: In function `int main()':
0_0_10630882_8496.cpp:44: error: no match for 'operator<' in 'std::cout < "The door cannot be opened.\n"'
0_0_10630882_8496.cpp:44: note: candidates are: operator<(const char*, const char*) <built-in>
0_0_10630882_8496.cpp:44: note:                 operator<(void*, void*) <built-in>