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#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
 
int main() {
 
	int row[13] = {1,2,3,4,5,6,7,8,9,10,11,12,13};
	char seats[6] = {'A','B','C','D','E','F'};
 
	int ticketType = 0;
 
	cout << "Please select a ticket type" << endl;
	cout << "Enter 1 for first class:" << endl;
	cout << "Enter 2 for business class" << endl;
	cout << "Enter 3 for economy class" << endl;
	cout << "Below is the seating table * means Occupied and X means available" << endl;
 
 
	cout << "       ";
	for(int i = 0; i < 6;i++)
	{
		cout << seats[i] << " ";
 
	}
	cout << endl;
	cout << "Row " << row[0] << "  * * X * X X"<< endl;
	cout << "Row " << row[1] << "  * X * X * X"<< endl;
	cout << "Row " << row[2] << "  * * X X * X"<< endl;
	cout << "Row " << row[3] << "  X * X * X X"<< endl;
	cout << "Row " << row[4] << "  * X * X * *"<< endl;
	cout << "Row " << row[5] << "  * X * * * X"<< endl;
	cout << "Row " << row[6] << "  X * * * X X"<< endl;
	cout << "Row " << row[7] << "  * X * X X *"<<endl;
	cout << "Row " << row[8] << "  X * X X * X"<< endl;
	cout << "Row " << row[9] << " * X * X X X"<< endl;
	cout << "Row " << row[10] <<" * * X * X *"<< endl;
	cout << "Row " << row[11] <<" * * X X * X"<<endl;
	cout << "Row " << row[12] <<" * * * * X *"<<endl;
	cout << "\nEnter Ticket type: " << endl;
	cin >> ticketType;
	cout << "You entered: " << ticketType << endl << endl;
	string seatNum;
 
	if(ticketType == 1){
		cout << "First class seating" << endl;
		cout << "you can may choose from row 1 to 2 enter the row and seat letter" << endl;
		cout << "Enter seat number: ";
		getline(cin,seatNum);
		if(seatNum == "1C"|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
		seatNum == "2F")
		cout << "seat is available " << seatNum << endl;
		else
		cout << "Seat is unavilable or invalid entry" << endl;
	}
	else if(ticketType == 2){
		cout << "business class seating" << endl;
		cout << "you can may choose from row 3 to 7 enter the row and seat letter" << endl;
	}
	else if(ticketType == 3){
		cout << "economy class seating" << endl;
		cout << "you can may choose from row 8 to 3 enter the row and seat letter"<<endl;
	}
	else {
	cout << "Ticket Type invalid please enter again 1, 2, or 3: ";
	cin >> ticketType;
	cout << "You entered: " << ticketType << endl << endl;
	}
 
	return 0;
 
}

prog.cpp:50:17: warning: multi-character character constant [-Wmultichar]
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
prog.cpp: In function ‘int main()’:
prog.cpp:50:14: error: no match for ‘operator==’ (operand types are ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} and ‘int’)
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
      ~~~~~~~~^~~~~~~
In file included from /usr/include/c++/8/iosfwd:40,
                 from /usr/include/c++/8/ios:38,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/postypes.h:216:5: note: candidate: ‘template<class _StateT> bool std::operator==(const std::fpos<_StateT>&, const std::fpos<_StateT>&)’
     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
     ^~~~~~~~
/usr/include/c++/8/bits/postypes.h:216:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::fpos<_StateT>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/stl_algobase.h:64,
                 from /usr/include/c++/8/bits/char_traits.h:39,
                 from /usr/include/c++/8/ios:40,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/stl_pair.h:448:5: note: candidate: ‘template<class _T1, class _T2> constexpr bool std::operator==(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)’
     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
     ^~~~~~~~
/usr/include/c++/8/bits/stl_pair.h:448:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::pair<_T1, _T2>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/stl_algobase.h:67,
                 from /usr/include/c++/8/bits/char_traits.h:39,
                 from /usr/include/c++/8/ios:40,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/stl_iterator.h:302:5: note: candidate: ‘template<class _Iterator> bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)’
     operator==(const reverse_iterator<_Iterator>& __x,
     ^~~~~~~~
/usr/include/c++/8/bits/stl_iterator.h:302:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::reverse_iterator<_Iterator>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/stl_algobase.h:67,
                 from /usr/include/c++/8/bits/char_traits.h:39,
                 from /usr/include/c++/8/ios:40,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/stl_iterator.h:340:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)’
     operator==(const reverse_iterator<_IteratorL>& __x,
     ^~~~~~~~
/usr/include/c++/8/bits/stl_iterator.h:340:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::reverse_iterator<_Iterator>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/stl_algobase.h:67,
                 from /usr/include/c++/8/bits/char_traits.h:39,
                 from /usr/include/c++/8/ios:40,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/stl_iterator.h:1115:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> bool std::operator==(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)’
     operator==(const move_iterator<_IteratorL>& __x,
     ^~~~~~~~
/usr/include/c++/8/bits/stl_iterator.h:1115:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::move_iterator<_IteratorL>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/stl_algobase.h:67,
                 from /usr/include/c++/8/bits/char_traits.h:39,
                 from /usr/include/c++/8/ios:40,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/stl_iterator.h:1121:5: note: candidate: ‘template<class _Iterator> bool std::operator==(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&)’
     operator==(const move_iterator<_Iterator>& __x,
     ^~~~~~~~
/usr/include/c++/8/bits/stl_iterator.h:1121:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::move_iterator<_IteratorL>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/string:41,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/allocator.h:146:5: note: candidate: ‘template<class _T1, class _T2> bool std::operator==(const std::allocator<_CharT>&, const std::allocator<_T2>&)’
     operator==(const allocator<_T1>&, const allocator<_T2>&)
     ^~~~~~~~
/usr/include/c++/8/bits/allocator.h:146:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::allocator<_CharT>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/string:41,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/allocator.h:152:5: note: candidate: ‘template<class _Tp> bool std::operator==(const std::allocator<_CharT>&, const std::allocator<_CharT>&)’
     operator==(const allocator<_Tp>&, const allocator<_Tp>&)
     ^~~~~~~~
/usr/include/c++/8/bits/allocator.h:152:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::allocator<_CharT>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/string:52,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/basic_string.h:6048:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/8/bits/basic_string.h:6048:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   mismatched types ‘const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’ and ‘int’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/string:52,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/basic_string.h:6056:5: note: candidate: ‘template<class _CharT> typename __gnu_cxx::__enable_if<std::__is_char<_Tp>::__value, bool>::__type std::operator==(const std::__cxx11::basic_string<_CharT>&, const std::__cxx11::basic_string<_CharT>&)’
     operator==(const basic_string<_CharT>& __lhs,
     ^~~~~~~~
/usr/include/c++/8/bits/basic_string.h:6056:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   mismatched types ‘const std::__cxx11::basic_string<_CharT>’ and ‘int’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/string:52,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/basic_string.h:6070:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
     operator==(const _CharT* __lhs,
     ^~~~~~~~
/usr/include/c++/8/bits/basic_string.h:6070:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   mismatched types ‘const _CharT*’ and ‘std::__cxx11::basic_string<char>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/string:52,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/basic_string.h:6082:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)’
     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/8/bits/basic_string.h:6082:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   mismatched types ‘const _CharT*’ and ‘int’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/ios_base.h:46,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/system_error:292:3: note: candidate: ‘bool std::operator==(const std::error_code&, const std::error_code&)’
   operator==(const error_code& __lhs, const error_code& __rhs) noexcept
   ^~~~~~~~
/usr/include/c++/8/system_error:292:3: note:   no known conversion for argument 1 from ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} to ‘const std::error_code&’
/usr/include/c++/8/system_error:297:3: note: candidate: ‘bool std::operator==(const std::error_code&, const std::error_condition&)’
   operator==(const error_code& __lhs, const error_condition& __rhs) noexcept
   ^~~~~~~~
/usr/include/c++/8/system_error:297:3: note:   no known conversion for argument 1 from ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} to ‘const std::error_code&’
/usr/include/c++/8/system_error:304:3: note: candidate: ‘bool std::operator==(const std::error_condition&, const std::error_code&)’
   operator==(const error_condition& __lhs, const error_code& __rhs) noexcept
   ^~~~~~~~
/usr/include/c++/8/system_error:304:3: note:   no known conversion for argument 1 from ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} to ‘const std::error_condition&’
/usr/include/c++/8/system_error:311:3: note: candidate: ‘bool std::operator==(const std::error_condition&, const std::error_condition&)’
   operator==(const error_condition& __lhs,
   ^~~~~~~~
/usr/include/c++/8/system_error:311:3: note:   no known conversion for argument 1 from ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} to ‘const std::error_condition&’
In file included from /usr/include/c++/8/bits/locale_facets.h:48,
                 from /usr/include/c++/8/bits/basic_ios.h:37,
                 from /usr/include/c++/8/ios:44,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/streambuf_iterator.h:203:5: note: candidate: ‘template<class _CharT, class _Traits> bool std::operator==(const std::istreambuf_iterator<_CharT, _Traits>&, const std::istreambuf_iterator<_CharT, _Traits>&)’
     operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
     ^~~~~~~~
/usr/include/c++/8/bits/streambuf_iterator.h:203:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::istreambuf_iterator<_CharT, _Traits>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/tuple:39,
                 from /usr/include/c++/8/bits/unique_ptr.h:37,
                 from /usr/include/c++/8/bits/locale_conv.h:41,
                 from /usr/include/c++/8/locale:43,
                 from /usr/include/c++/8/iomanip:43,
                 from prog.cpp:2:
/usr/include/c++/8/array:252:5: note: candidate: ‘template<class _Tp, long unsigned int _Nm> bool std::operator==(const std::array<_Tp, _Nm>&, const std::array<_Tp, _Nm>&)’
     operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
     ^~~~~~~~
/usr/include/c++/8/array:252:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::array<_Tp, _Nm>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/unique_ptr.h:37,
                 from /usr/include/c++/8/bits/locale_conv.h:41,
                 from /usr/include/c++/8/locale:43,
                 from /usr/include/c++/8/iomanip:43,
                 from prog.cpp:2:
/usr/include/c++/8/tuple:1413:5: note: candidate: ‘template<class ... _TElements, class ... _UElements> constexpr bool std::operator==(const std::tuple<_Tps ...>&, const std::tuple<_Elements ...>&)’
     operator==(const tuple<_TElements...>& __t,
     ^~~~~~~~
/usr/include/c++/8/tuple:1413:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::tuple<_Tps ...>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/locale_conv.h:41,
                 from /usr/include/c++/8/locale:43,
                 from /usr/include/c++/8/iomanip:43,
                 from prog.cpp:2:
/usr/include/c++/8/bits/unique_ptr.h:689:5: note: candidate: ‘template<class _Tp, class _Dp, class _Up, class _Ep> bool std::operator==(const std::unique_ptr<_Tp, _Dp>&, const std::unique_ptr<_Up, _Ep>&)’
     operator==(const unique_ptr<_Tp, _Dp>& __x,
     ^~~~~~~~
/usr/include/c++/8/bits/unique_ptr.h:689:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::unique_ptr<_Tp, _Dp>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/locale_conv.h:41,
                 from /usr/include/c++/8/locale:43,
                 from /usr/include/c++/8/iomanip:43,
                 from prog.cpp:2:
/usr/include/c++/8/bits/unique_ptr.h:695:5: note: candidate: ‘template<class _Tp, class _Dp> bool std::operator==(const std::unique_ptr<_Tp, _Dp>&, std::nullptr_t)’
     operator==(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept
     ^~~~~~~~
/usr/include/c++/8/bits/unique_ptr.h:695:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::unique_ptr<_Tp, _Dp>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/locale_conv.h:41,
                 from /usr/include/c++/8/locale:43,
                 from /usr/include/c++/8/iomanip:43,
                 from prog.cpp:2:
/usr/include/c++/8/bits/unique_ptr.h:700:5: note: candidate: ‘template<class _Tp, class _Dp> bool std::operator==(std::nullptr_t, const std::unique_ptr<_Tp, _Dp>&)’
     operator==(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept
     ^~~~~~~~
/usr/include/c++/8/bits/unique_ptr.h:700:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   mismatched types ‘const std::unique_ptr<_Tp, _Dp>’ and ‘int’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/stl_algobase.h:67,
                 from /usr/include/c++/8/bits/char_traits.h:39,
                 from /usr/include/c++/8/ios:40,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/stl_iterator.h:863:5: note: candidate: ‘template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_IteratorL, _Container>&, const __gnu_cxx::__normal_iterator<_IteratorR, _Container>&)’
     operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
     ^~~~~~~~
/usr/include/c++/8/bits/stl_iterator.h:863:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const __gnu_cxx::__normal_iterator<_IteratorL, _Container>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/c++/8/bits/stl_algobase.h:67,
                 from /usr/include/c++/8/bits/char_traits.h:39,
                 from /usr/include/c++/8/ios:40,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/bits/stl_iterator.h:870:5: note: candidate: ‘template<class _Iterator, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_Iterator, _Container>&, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)’
     operator==(const __normal_iterator<_Iterator, _Container>& __lhs,
     ^~~~~~~~
/usr/include/c++/8/bits/stl_iterator.h:870:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const __gnu_cxx::__normal_iterator<_Iterator, _Container>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/8/bits/c++allocator.h:33,
                 from /usr/include/c++/8/bits/allocator.h:46,
                 from /usr/include/c++/8/string:41,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/8/ext/new_allocator.h:155:5: note: candidate: ‘template<class _Tp> bool __gnu_cxx::operator==(const __gnu_cxx::new_allocator<_Tp>&, const __gnu_cxx::new_allocator<_Tp>&)’
     operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
     ^~~~~~~~
/usr/include/c++/8/ext/new_allocator.h:155:5: note:   template argument deduction/substitution failed:
prog.cpp:50:17: note:   ‘std::__cxx11::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const __gnu_cxx::new_allocator<_Tp>’
   if(seatNum == '1C'|| seatNum == "1E"||seatNum == "1F" || seatNum =="2B" || seatNum =="2D" ||
                 ^~~~

Standard output is empty