Language: C++

#include <iostream>
using namespace std;
#include <string>

int main() {
	string X, Y;
	cin >> X >> Y;
	
	map<string, int> hex;
	hex["A"] = 10; hex["B"] = 11; hex["C"] = 12;
	hex["D"] = 13; hex["E"] = 14; hex["F"] = 15;
	
	char c;
	if(hex[X] == hex[Y]) c = '=';
	else if(hex[X] > hex[Y]) c= '>';
	else if(hex[X] < hex[Y]) c = '<';
	
	cout << c;
	cout < endl;
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'map' was not declared in this scope
    9 |         map<string, int> hex;
      |         ^~~
a.cc:2:1: note: 'std::map' is defined in header '<map>'; this is probably fixable by adding '#include <map>'
    1 | #include <iostream>
  +++ |+#include <map>
    2 | using namespace std;
a.cc:9:19: error: expected primary-expression before ',' token
    9 |         map<string, int> hex;
      |                   ^
a.cc:9:21: error: expected primary-expression before 'int'
    9 |         map<string, int> hex;
      |                     ^~~
a.cc:10:12: error: invalid types 'std::ios_base&(std::ios_base&)[const char [2]]' for array subscript
   10 |         hex["A"] = 10; hex["B"] = 11; hex["C"] = 12;
      |            ^
a.cc:10:27: error: invalid types 'std::ios_base&(std::ios_base&)[const char [2]]' for array subscript
   10 |         hex["A"] = 10; hex["B"] = 11; hex["C"] = 12;
      |                           ^
a.cc:10:42: error: invalid types 'std::ios_base&(std::ios_base&)[const char [2]]' for array subscript
   10 |         hex["A"] = 10; hex["B"] = 11; hex["C"] = 12;
      |                                          ^
a.cc:11:12: error: invalid types 'std::ios_base&(std::ios_base&)[const char [2]]' for array subscript
   11 |         hex["D"] = 13; hex["E"] = 14; hex["F"] = 15;
      |            ^
a.cc:11:27: error: invalid types 'std::ios_base&(std::ios_base&)[const char [2]]' for array subscript
   11 |         hex["D"] = 13; hex["E"] = 14; hex["F"] = 15;
      |                           ^
a.cc:11:42: error: invalid types 'std::ios_base&(std::ios_base&)[const char [2]]' for array subscript
   11 |         hex["D"] = 13; hex["E"] = 14; hex["F"] = 15;
      |                                          ^
a.cc:14:15: error: no match for 'operator[]' (operand types are 'std::ios_base&(std::ios_base&)' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   14 |         if(hex[X] == hex[Y]) c = '=';
      |               ^
a.cc:14:25: error: no match for 'operator[]' (operand types are 'std::ios_base&(std::ios_base&)' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   14 |         if(hex[X] == hex[Y]) c = '=';
      |                         ^
a.cc:15:20: error: no match for 'operator[]' (operand types are 'std::ios_base&(std::ios_base&)' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   15 |         else if(hex[X] > hex[Y]) c= '>';
      |                    ^
a.cc:15:29: error: no match for 'operator[]' (operand types are 'std::ios_base&(std::ios_base&)' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   15 |         else if(hex[X] > hex[Y]) c= '>';
      |                             ^
a.cc:16:20: error: no match for 'operator[]' (operand types are 'std::ios_base&(std::ios_base&)' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   16 |         else if(hex[X] < hex[Y]) c = '<';
      |                    ^
a.cc:16:29: error: no match for 'operator[]' (operand types are 'std::ios_base&(std::ios_base&)' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   16 |         else if(hex[X] < hex[Y]) c = '<';
      |                             ^
a.cc:19:14: error: no match for 'operator<' (operand types are 'std::ostream' {aka 'std::basic_ostream<char>'} and '<unresolved overloaded function type>')
   19 |         cout < endl;
      |         ~~~~~^~~~~~
In file included from /usr/include/c++/14/string:48,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:448:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  448 |     operator<(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:448:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   19 |         cout < endl;
      |                ^~~~
/usr/include/c++/14/bits/stl_iterator.h:493:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  493 |     operator<(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:493:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   19 |         cout < endl;
      |                ^~~~
/usr/include/c++/14/bits/stl_iterator.h:1694:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1694 |     operator<(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1694:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
   19 |         cout < endl;
      |                ^~~~
/usr/include/c++/14/bits/stl_iterator.h:1760:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1760 |     operator<(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1760:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
   19 |         cout < endl;
      |                ^~~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/string:51:
/usr/include/c++/14/bits/stl_pair.h:1045:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator<(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1045 |     operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1045:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::pair<_T1, _T2>'
   19 |         cout < endl;
      |                ^~~~
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/usr/include/c++/14/string_view:673:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator<(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  673 |     operator< (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:673:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::basic_ostream<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   19 |         cout < endl;
      |                ^~~~
/usr/include/c++/14/string_view:680:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator<(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  680 |     operator< (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:680:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::basic_ostream<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   19 |         cout < endl;
      |                ^~~~
/usr/include/c++/14/string_view:688:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator<(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  688 |     operator< (__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:688:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   couldn't deduce template parameter '_CharT'
   19 |         cout < endl;
      |                ^~~~
/usr/include/c++/14/bits/basic_string.h:3874:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3874 |     operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3874:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   19 |         cout < endl;
      |                ^~~~
/usr/include/c++/14/bits/basic_string.h:3888:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3888 |     operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3888:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   19 |         cout < endl;
      |                ^~~~
/usr/include/c++/14/bits/basic_string.h:3901:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3901 |     operator<(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3901:5: note:   template argument deduction/substitution failed:
a.cc:19:16: note:   mismatched types 'const _CharT*' and