foo.cc: In function ‘int main()’:
foo.cc:9:14: error: expected ‘;’ before ‘}’ token
    9 |          a+=1}
      |              ^
      |              ;
foo.cc:10:5: error: no match for ‘operator>>’ (operand types are ‘std::ostream’ {aka ‘std::basic_ostream<char>’} and ‘int’)
   10 | cout>>a;
      | ~~~~^~~
      | |     |
      | |     int
      | std::ostream {aka std::basic_ostream<char>}
foo.cc:10:5: note: candidate: ‘operator>>(int, int)’ (built-in)
   10 | cout>>a;
      | ~~~~^~~
foo.cc:10:5: note:   no known conversion for argument 1 from ‘std::ostream’ {aka ‘std::basic_ostream<char>’} to ‘int’
In file included from /nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/string:55,
                 from /nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/locale_classes.h:40,
                 from /nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/ios_base.h:41,
                 from /nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/ios:44,
                 from /nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/ostream:40,
                 from iostream:41:
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/basic_string.tcc:835:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
  835 |     operator>>(basic_istream<_CharT, _Traits>& __in,
      |     ^~~~~~~~
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/basic_string.tcc:835:5: note:   template argument deduction/substitution failed:
foo.cc:10:7: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
   10 | cout>>a;
      |       ^
In file included from /nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:1109,
                 from iostream:42:
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/istream.tcc:978:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT&)’
  978 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
      |     ^~~~~~~~
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/istream.tcc:978:5: note:   template argument deduction/substitution failed:
foo.cc:10:7: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
   10 | cout>>a;
      |       ^
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:849:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char&)’
  849 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
      |     ^~~~~~~~
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:849:5: note:   template argument deduction/substitution failed:
foo.cc:10:7: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
   10 | cout>>a;
      |       ^
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:854:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char&)’
  854 |     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
      |     ^~~~~~~~
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:854:5: note:   template argument deduction/substitution failed:
foo.cc:10:7: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
   10 | cout>>a;
      |       ^
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:896:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT*)’
  896 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
      |     ^~~~~~~~
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:896:5: note:   template argument deduction/substitution failed:
foo.cc:10:7: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
   10 | cout>>a;
      |       ^
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:939:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char*)’
  939 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
      |     ^~~~~~~~
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:939:5: note:   template argument deduction/substitution failed:
foo.cc:10:7: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
   10 | cout>>a;
      |       ^
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:945:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char*)’
  945 |     operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
      |     ^~~~~~~~
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:945:5: note:   template argument deduction/substitution failed:
foo.cc:10:7: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
   10 | cout>>a;
      |       ^
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:1099:5: note: candidate: ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&)’
 1099 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:1099:5: note:   template argument deduction/substitution failed:
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream: In substitution of ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ostream<char>&; _Tp = int&]’:
foo.cc:10:7:   required from here
   10 | cout>>a;
      |       ^
/nix/gcc-14.2.1.20250322/include/c++/14.2.1.20250322/istream:1099:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’
 1099 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~