ed.cpp: In function 'int main()': ed.cpp:32: error: invalid conversion from 'int' to 'const char*' ed.cpp:32: error: initializing argument 2 of 'std::basic_string<_CharT, _Traits, _Alloc>& std::basic_string<_CharT, _Traits, _Alloc>::insert(typename _Alloc::rebind<_CharT>::other::size_type, const _CharT*) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]' ed.cpp:37: error: invalid conversion from 'int' to 'const char*' ed.cpp:37: error: initializing argument 1 of 'int atoi(const char*)'