View Compilation Error

0_0_4099687_14984.cpp:5: error: `main' must return `int'
0_0_4099687_14984.cpp: In function `int main(...)':
0_0_4099687_14984.cpp:7: error: no match for 'operator!=' in '(+(&std::cin)->std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&a))))->std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&b))) != -0x000000001'