/in/foo.cc: In function 'std::istream& operator>>(std::istream&, Complex&)':
/in/foo.cc:24:22: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'const char [2]')
   24 |         is >> c.real >> " " >> c.imag;
      |         ~~~~~~~~~~~~ ^~ ~~~
      |            |            |
      |            |            const char [2]
      |            std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}
In file included from /usr/include/c++/12/iostream:40,
                 from /in/foo.cc:1:
/usr/include/c++/12/istream:168:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  168 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/12/istream:168:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'const char*'
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
/usr/include/c++/12/istream:172:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  172 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/12/istream:172:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const char*' to 'short int' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const char*
/in/foo.cc:24:25: error: cannot bind rvalue '(short int)((const char*)" ")' to 'short int&'
/usr/include/c++/12/istream:175:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  175 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/12/istream:175:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const char*' to 'short unsigned int' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const char*
/in/foo.cc:24:25: error: cannot bind rvalue '(short unsigned int)((const char*)" ")' to 'short unsigned int&'
/usr/include/c++/12/istream:179:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  179 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/12/istream:179:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const char*' to 'int' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const char*
/in/foo.cc:24:25: error: cannot bind rvalue '(int)((const char*)" ")' to 'int&'
/usr/include/c++/12/istream:182:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  182 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/12/istream:182:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const char*' to 'unsigned int' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const char*
/in/foo.cc:24:25: error: cannot bind rvalue '(unsigned int)((const char*)" ")' to 'unsigned int&'
/usr/include/c++/12/istream:186:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  186 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/12/istream:186:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const char*' to 'long int' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const char*
/in/foo.cc:24:25: error: cannot bind rvalue '(long int)((const char*)" ")' to 'long int&'
/usr/include/c++/12/istream:190:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  190 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/12/istream:190:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const char*' to 'long unsigned int' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const char*
/in/foo.cc:24:25: error: cannot bind rvalue '(long unsigned int)((const char*)" ")' to 'long unsigned int&'
/usr/include/c++/12/istream:195:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  195 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/12/istream:195:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const char*' to 'long long int' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const char*
/in/foo.cc:24:25: error: cannot bind rvalue '(long long int)((const char*)" ")' to 'long long int&'
/usr/include/c++/12/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/12/istream:199:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const char*' to 'long long unsigned int' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const char*
/in/foo.cc:24:25: error: cannot bind rvalue '(long long unsigned int)((const char*)" ")' to 'long long unsigned int&'
/usr/include/c++/12/istream:235:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  235 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/12/istream:235:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:24:25: error: invalid conversion from 'const void*' to 'void*' [-fpermissive]
   24 |         is >> c.real >> " " >> c.imag;
      |                         ^~~
      |                         |
      |                         const void*
/in/foo.cc:24:25: error: cannot bind rvalue '(void*)((const void*)((const char*)" "))