Solution.cpp: In function ‘void check2()’:
Solution.cpp:82:8: error: no match for ‘operator<<’ (operand types are ‘std::ostream’ {aka ‘std::basic_ostream<char>’} and ‘Box’)
    cout<<temp<<endl;
    ~~~~^~~~~~
In file included from /usr/local/include/c++/8.3.0/istream:39,
                 from /usr/local/include/c++/8.3.0/sstream:38,
                 from /usr/local/include/c++/8.3.0/complex:45,
                 from /usr/local/include/c++/8.3.0/ccomplex:39,
                 from /usr/local/include/c++/8.3.0/x86_64-linux-gnu/bits/stdc++.h:52,
                 from Solution.cpp:1:
/usr/local/include/c++/8.3.0/ostream:108:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ostream_type& (*)(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(__ostream_type& (*__pf)(__ostream_type&))
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:108:7: note:   no known conversion for argument 1 from ‘Box’ to ‘std::basic_ostream<char>::__ostream_type& (*)(std::basic_ostream<char>::__ostream_type&)’ {aka ‘std::basic_ostream<char>& (*)(std::basic_ostream<char>&)’}
/usr/local/include/c++/8.3.0/ostream:117:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ios_type& (*)(std::basic_ostream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>; std::basic_ostream<_CharT, _Traits>::__ios_type = std::basic_ios<char>]’
       operator<<(__ios_type& (*__pf)(__ios_type&))
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:117:7: note:   no known conversion for argument 1 from ‘Box’ to ‘std::basic_ostream<char>::__ios_type& (*)(std::basic_ostream<char>::__ios_type&)’ {aka ‘std::basic_ios<char>& (*)(std::basic_ios<char>&)’}
/usr/local/include/c++/8.3.0/ostream:127:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(ios_base& (*__pf) (ios_base&))
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:127:7: note:   no known conversion for argument 1 from ‘Box’ to ‘std::ios_base& (*)(std::ios_base&)’
/usr/local/include/c++/8.3.0/ostream:166:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(long __n)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:166:7: note:   no known conversion for argument 1 from ‘Box’ to ‘long int’
/usr/local/include/c++/8.3.0/ostream:170:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(unsigned long __n)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:170:7: note:   no known conversion for argument 1 from ‘Box’ to ‘long unsigned int’
/usr/local/include/c++/8.3.0/ostream:174:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(bool __n)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:174:7: note:   no known conversion for argument 1 from ‘Box’ to ‘bool’
In file included from /usr/local/include/c++/8.3.0/ostream:693,
                 from /usr/local/include/c++/8.3.0/istream:39,
                 from /usr/local/include/c++/8.3.0/sstream:38,
                 from /usr/local/include/c++/8.3.0/complex:45,
                 from /usr/local/include/c++/8.3.0/ccomplex:39,
                 from /usr/local/include/c++/8.3.0/x86_64-linux-gnu/bits/stdc++.h:52,
                 from Solution.cpp:1:
/usr/local/include/c++/8.3.0/bits/ostream.tcc:91:5: note: candidate: ‘std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char; _Traits = std::char_traits<char>]’
     basic_ostream<_CharT, _Traits>::
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/8.3.0/bits/ostream.tcc:91:5: note:   no known conversion for argument 1 from ‘Box’ to ‘short int’
In file included from /usr/local/include/c++/8.3.0/istream:39,
                 from /usr/local/include/c++/8.3.0/sstream:38,
                 from /usr/local/include/c++/8.3.0/complex:45,
                 from /usr/local/include/c++/8.3.0/ccomplex:39,
                 from /usr/local/include/c++/8.3.0/x86_64-linux-gnu/bits/stdc++.h:52,
                 from Solution.cpp:1:
/usr/local/include/c++/8.3.0/ostream:181:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(unsigned short __n)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:181:7: note:   no known conversion for argument 1 from ‘Box’ to ‘short unsigned int’
In file included from /usr/local/include/c++/8.3.0/ostream:693,
                 from /usr/local/include/c++/8.3.0/istream:39,
                 from /usr/local/include/c++/8.3.0/sstream:38,
                 from /usr/local/include/c++/8.3.0/complex:45,
                 from /usr/local/include/c++/8.3.0/ccomplex:39,
                 from /usr/local/include/c++/8.3.0/x86_64-linux-gnu/bits/stdc++.h:52,
                 from Solution.cpp:1:
/usr/local/include/c++/8.3.0/bits/ostream.tcc:105:5: note: candidate: ‘std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char; _Traits = std::char_traits<char>]’
     basic_ostream<_CharT, _Traits>::
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/8.3.0/bits/ostream.tcc:105:5: note:   no known conversion for argument 1 from ‘Box’ to ‘int’
In file included from /usr/local/include/c++/8.3.0/istream:39,
                 from /usr/local/include/c++/8.3.0/sstream:38,
                 from /usr/local/include/c++/8.3.0/complex:45,
                 from /usr/local/include/c++/8.3.0/ccomplex:39,
                 from /usr/local/include/c++/8.3.0/x86_64-linux-gnu/bits/stdc++.h:52,
                 from Solution.cpp:1:
/usr/local/include/c++/8.3.0/ostream:192:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(unsigned int __n)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:192:7: note:   no known conversion for argument 1 from ‘Box’ to ‘unsigned int’
/usr/local/include/c++/8.3.0/ostream:201:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(long long __n)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:201:7: note:   no known conversion for argument 1 from ‘Box’ to ‘long long int’
/usr/local/include/c++/8.3.0/ostream:205:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(unsigned long long __n)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:205:7: note:   no known conversion for argument 1 from ‘Box’ to ‘long long unsigned int’
/usr/local/include/c++/8.3.0/ostream:220:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(double __f)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:220:7: note:   no known conversion for argument 1 from ‘Box’ to ‘double’
/usr/local/include/c++/8.3.0/ostream:224:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(float) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(float __f)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:224:7: note:   no known conversion for argument 1 from ‘Box’ to ‘float’
/usr/local/include/c++/8.3.0/ostream:232:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long double) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
       operator<<(long double __f)
       ^~~~~~~~
/usr/local/include/c++/8.3.0/ostream:232:7: note:   no known conversion for argument 1 from ‘Box’ to ‘long double’
/usr/local/include/c++/8.3.0/ostream:245:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_Char