Language: C++

#include<stdio.h>
#include<iostream>
#include<string>
using namespace std;

struct ch {
	char num;
	char eng;
};
void bubblesort(struct ch str[], int n);
void selectionsort(struct ch str[], int n);

int main()
{
	int n,i,j;
	ch str1[100],str2[100];
	cin >> n;

	for (i = 0; i < n; i++) {
		cin >> str1[i].num >> str1[i].eng;
	}
	for (i = 0; i < n; i++) str2[i] = str1[i];

	bubblesort(str1,n);
	selectionsort(str2, n);

	for (i = 0; i < n; i++) {
		cout << str1[i].eng << str1[i].num << endl;

		if (i != n - 1) {
			cout << " ";
		}
		else {
			cout << endl;
			break;
		}
	}
	cout << "Stable" << endl;
	j = 1;
	for (i = 0; i < n; i++) {
		cout << str2[i].eng << str2[i].num << endl;
		if (j == 1 || str2[i] == str1[i]) {
			j = 1;
		}else {
			j = 0;
		}
		if (i != n - 1) {
			cout << " ";
		}
		else {
			cout << endl;
			break;
		}
	}
	if (j == 1) {
		cout << "Stable" << endl;
	}
	else {
		cout << "Not stable" << endl;
	}
}
void bubblesort(struct ch str[], int n) {
	int i,j;
	struct ch temp;
	for (i = 0; i < n; i++) {
		for (j = n - 1; j > i + 1; i--) {
			if (str[j].num < str[j - 1].num) {
				temp = str[j];
				str[j] = str[j - 1];
				str[j - 1] = temp;
			}
		}
	}
}
void selectionsort(struct ch str[], int n) {
	struct ch temp;
	int i, j,min;
	for (i = 0; i < n; i++) {
		min = i;
		for (j = i; i < n; i++) {
			if (str[j].num < str[min].num) {
				min = j;
			}
		}
		temp = str[j];
		str[j] = str[j - 1];
		str[j - 1] = temp;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:39: error: no match for 'operator==' (operand types are 'ch' and 'ch')
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                               ~~~~~~~ ^~ ~~~~~~~
      |                                     |          |
      |                                     ch         ch
In file included from /usr/include/c++/14/iosfwd:42,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:2:
/usr/include/c++/14/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)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:192:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::fpos<_StateT>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
In file included from /usr/include/c++/14/string:43,
                 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:
/usr/include/c++/14/bits/allocator.h:235:5: note: candidate: 'template<class _T1, class _T2> bool std::operator==(const allocator<_CharT>&, const allocator<_T2>&)'
  235 |     operator==(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:235:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::allocator<_CharT>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
In file included from /usr/include/c++/14/string:48:
/usr/include/c++/14/bits/stl_iterator.h:441:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  441 |     operator==(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:441:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::reverse_iterator<_Iterator>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
/usr/include/c++/14/bits/stl_iterator.h:486:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  486 |     operator==(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:486:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::reverse_iterator<_Iterator>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1667 |     operator==(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::move_iterator<_IteratorL>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1737 |     operator==(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::move_iterator<_IteratorL>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
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:1033:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator==(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1033 |     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1033:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::pair<_T1, _T2>'
   42 |                 if (j == 1 || str2[i] == str1[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:629:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  629 |     operator==(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:629:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
/usr/include/c++/14/string_view:637:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  637 |     operator==(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:637:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
/usr/include/c++/14/string_view:644:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  644 |     operator==(__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:644:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
/usr/include/c++/14/bits/basic_string.h:3755:5: 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>&)'
 3755 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3755:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
/usr/include/c++/14/bits/basic_string.h:3772:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3772 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3772:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
/usr/include/c++/14/bits/basic_string.h:3819:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3819 |     operator==(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3819:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   mismatched types 'const _CharT*' and 'ch'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
In file included from /usr/include/c++/14/bits/memory_resource.h:47,
                 from /usr/include/c++/14/string:68:
/usr/include/c++/14/tuple:2558:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator==(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2558 |     operator==(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2558:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::tuple<_UTypes ...>'
   42 |                 if (j == 1 || str2[i] == str1[i]) {
      |                                                ^
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46:
/usr/include/c++/14/bits/streambuf_iterator.h:234:5: note: candidate: 'template<class _CharT, class _Traits> bool std::operator==(const istreambuf_iterator<_CharT, _Traits>&, const istreambuf_iterator<_CharT, _Traits>&)'
  234 |     operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
      |     ^~~~~~~~
/usr/include/c++/14/bits/streambuf_iterator.h:234:5: note:   template argument deduction/substitution failed:
a.cc:42:48: note:   'ch' is not derived from 'const std::istreambuf_iterator<_CharT, _Traits>'
   42 |                 if (j == 1 || st