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View Compilation Error

0_0_38894828_815.cpp: In function 'int main()':
0_0_38894828_815.cpp:5:22: error: no match for 'operator==' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'int')
    5 |     while (cin>>a>>b == 2) {
      |            ~~~~~~~~~ ^~ ~
      |                  |      |
      |                  |      int
      |                  std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/string:43,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/locale_classes.h:40,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ios_base.h:41,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ios:44,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ostream:40,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:41,
                 from 0_0_38894828_815.cpp:1:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/allocator.h:237:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator==(const allocator<_CharT>&, const allocator<_T2>&)' (reversed)
  237 |     operator==(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/allocator.h:237:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   mismatched types 'const std::allocator<_CharT>' and 'int'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/string:48:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator.h:534:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const reverse_iterator<_IteratorL>&, const reverse_iterator<_IteratorR>&) requires requires{{std::operator==::__x->base() == std::operator==::__y->base()} -> decltype(auto) [requires std::convertible_to<<placeholder>, bool>];}' (reversed)
  534 |     operator==(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator.h:534:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   mismatched types 'const std::reverse_iterator<_IteratorL>' and 'int'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator.h:1678:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&) requires requires{{std::operator==::__x->base() == std::operator==::__y->base()} -> decltype(auto) [requires std::convertible_to<<placeholder>, bool>];}' (reversed)
 1678 |     operator==(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator.h:1678:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/basic_string.h:47,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/string:54:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/string_view:615:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)' (reversed)
  615 |     operator==(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/string_view:615:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/basic_string.h:3726:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr bool std::operator==(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)' (reversed)
 3726 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/basic_string.h:3726:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/uses_allocator_args.h:38,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/memory_resource.h:41,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/string:58:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/tuple:1905:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator==(const tuple<_UTypes ...>&, const tuple<_UTypes ...>&)' (reversed)
 1905 |     operator==(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/tuple:1905:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   mismatched types 'const std::tuple<_UTypes ...>' and 'int'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ios_base.h:46:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/system_error:465:3: note: candidate: 'bool std::operator==(const error_code&, const error_condition&)' (reversed)
  465 |   operator==(const error_code& __lhs, const error_condition& __rhs) noexcept
      |   ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/system_error:465:32: note:   no known conversion for argument 1 from 'int' to 'const std::error_code&'
  465 |   operator==(const error_code& __lhs, const error_condition& __rhs) noexcept
      |              ~~~~~~~~~~~~~~~~~~^~~~~
0_0_38894828_815.cpp:5:22: note: candidate: 'operator==(int, int)' (built-in)
    5 |     while (cin>>a>>b == 2) {
      |            ~~~~~~~~~~^~~~
0_0_38894828_815.cpp:5:22: note:   no known conversion for argument 1 from 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} to 'int'
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iosfwd:42,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ios:40:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/postypes.h:192:5: note: candidate: 'template<class _StateT> bool std::operator==(const fpos<_StateT>&, const fpos<_StateT>&)'
  192 |     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/postypes.h:192:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} is not derived from 'const std::fpos<_StateT>'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator.h:593:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const reverse_iterator<_IteratorL>&, const reverse_iterator<_IteratorL>&) requires requires{{std::operator==::__x->base() == std::operator==::__y->base()} -> decltype(auto) [requires std::convertible_to<<placeholder>, bool>];}'
  593 |     operator==(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator.h:593:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} is not derived from 'const std::reverse_iterator<_IteratorL>'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator.h:1748:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1748 |     operator==(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator.h:1748:5: note:   template argument deduction/substitution failed:
0_0_38894828_815.cpp:5:25: note:   'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
    5 |     while (cin>>a>>b == 2) {
      |                         ^
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_algobase.h:64,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/string:51:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_pair


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