Language: C++

#include<cstdio>
#include<vector>
#include<string>
 
using namespace std;
vector <string> week[]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
 
int main(){
  string st;
  int i;
  cin >> st;
  for(i=0;week[i]!=st;i++);
   
  cout << week[(i+2)%7];
    
}

Compiler output:
a.cc:6:25: error: conversion from 'const char [4]' to non-scalar type 'std::vector<std::__cxx11::basic_string<char> >' requested
    6 | vector <string> week[]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
      |                         ^~~~~
a.cc:6:31: error: conversion from 'const char [4]' to non-scalar type 'std::vector<std::__cxx11::basic_string<char> >' requested
    6 | vector <string> week[]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
      |                               ^~~~~
a.cc:6:37: error: conversion from 'const char [4]' to non-scalar type 'std::vector<std::__cxx11::basic_string<char> >' requested
    6 | vector <string> week[]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
      |                                     ^~~~~
a.cc:6:43: error: conversion from 'const char [4]' to non-scalar type 'std::vector<std::__cxx11::basic_string<char> >' requested
    6 | vector <string> week[]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
      |                                           ^~~~~
a.cc:6:49: error: conversion from 'const char [4]' to non-scalar type 'std::vector<std::__cxx11::basic_string<char> >' requested
    6 | vector <string> week[]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
      |                                                 ^~~~~
a.cc:6:55: error: conversion from 'const char [4]' to non-scalar type 'std::vector<std::__cxx11::basic_string<char> >' requested
    6 | vector <string> week[]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
      |                                                       ^~~~~
a.cc:6:61: error: conversion from 'const char [4]' to non-scalar type 'std::vector<std::__cxx11::basic_string<char> >' requested
    6 | vector <string> week[]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
      |                                                             ^~~~~
a.cc: In function 'int main()':
a.cc:11:3: error: 'cin' was not declared in this scope
   11 |   cin >> st;
      |   ^~~
a.cc:4:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    3 | #include<string>
  +++ |+#include <iostream>
    4 | 
a.cc:12:18: error: no match for 'operator!=' (operand types are 'std::vector<std::__cxx11::basic_string<char> >' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   12 |   for(i=0;week[i]!=st;i++);
      |           ~~~~~~~^~~~
      |                 |  |
      |                 |  std::string {aka std::__cxx11::basic_string<char>}
      |                 std::vector<std::__cxx11::basic_string<char> >
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/vector:62,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_pair.h:1052:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator!=(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1052 |     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1052:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'const std::pair<_T1, _T2>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:455:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  455 |     operator!=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:455:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'const std::reverse_iterator<_Iterator>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
/usr/include/c++/14/bits/stl_iterator.h:500:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  500 |     operator!=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:500:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'const std::reverse_iterator<_Iterator>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1686 |     operator!=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'const std::move_iterator<_IteratorL>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1753 |     operator!=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'const std::move_iterator<_IteratorL>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
In file included from /usr/include/c++/14/vector:63:
/usr/include/c++/14/bits/allocator.h:243:5: note: candidate: 'template<class _T1, class _T2> bool std::operator!=(const allocator<_Tp1>&, const allocator<_T2>&)'
  243 |     operator!=(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:243:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'const std::allocator<_Tp1>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
In file included from /usr/include/c++/14/vector:66:
/usr/include/c++/14/bits/stl_vector.h:2096:5: note: candidate: 'template<class _Tp, class _Alloc> bool std::operator!=(const vector<_Tp, _Alloc>&, const vector<_Tp, _Alloc>&)'
 2096 |     operator!=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:2096:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::vector<_Tp, _Alloc>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
In file included from /usr/include/c++/14/bits/memory_resource.h:47,
                 from /usr/include/c++/14/vector:87:
/usr/include/c++/14/tuple:2613:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator!=(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2613 |     operator!=(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2613:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'const std::tuple<_UTypes ...>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
In file included from /usr/include/c++/14/bits/char_traits.h:42,
                 from /usr/include/c++/14/string:42,
                 from a.cc:3:
/usr/include/c++/14/bits/postypes.h:197:5: note: candidate: 'template<class _StateT> bool std::operator!=(const fpos<_StateT>&, const fpos<_StateT>&)'
  197 |     operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:197:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'const std::fpos<_StateT>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
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:651:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  651 |     operator!=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:651:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
/usr/include/c++/14/string_view:658:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  658 |     operator!=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:658:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::vector<std::__cxx11::basic_string<char> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
/usr/include/c++/14/string_view:666:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  666 |     operator!=(__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:666:5: note:   template argument deduction/substitution failed:
a.cc:12:20: note:   'std::__cxx11::basic_string<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   12 |   for(i=0;week[i]!=st;i++);
      |                    ^~
/usr/include/c++/14/bits/basic_string.h:3833:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc