View Compilation Error

0_0_3945211_23837.cpp: In function `int main()':
0_0_3945211_23837.cpp:8: error: no match for 'operator!=' in 'std::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((std::basic_istream<char, std::char_traits<char> >&)(&std::cin)), ((char*)(&s))) != -0x000000001'