View Compilation Error

0_0_3803640_27621.cpp: In function `int main(int, char**)':
0_0_3803640_27621.cpp:20: error: no match for 'operator<' in '(&std::cout)->std::basic_ostream<_CharT, _Traits>::operator<< [with _CharT = char, _Traits = std::char_traits<char>]((*((+(((unsigned int)i) * 4u)) + a))) < ' ''
0_0_3803640_27621.cpp:21: error: name lookup of `i' changed for new ISO `for' scoping
0_0_3803640_27621.cpp:19: error:   using obsolete binding at `i'