Rezumat problemă

Preordine

#670

Se dă un arbore binar care conține valori numere naturale. Să se afișeze valorile din arbore în urma parcurgerii în preordine.

Notă: pentru reprezentarea arborelui se recomandă alocarea statică, folosind tablouri.

Fișiere Candale Silviu (silviu) ușoară

Clasa 11 Structuri de date arborescente Arbori binari

Rezolvă

Detalii

Problema	Preordine	Operații I/O	preordine.in/preordine.out
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64815778	Utilizator	Olosuteanu Andrei Iarin (andrei_iarin)
Fișier	preordine.cpp	Dimensiune	725 B
Data încărcării	03 Iunie 2026, 10:35	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

preordine.cpp: In function ‘void RSD(int)’:
preordine.cpp:18:10: error: no match for ‘operator>>’ (operand types are ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} and ‘int’)
   18 |     cout >> a[x].val >> " ";
      |     ~~~~ ^~ ~~~~~~~~
      |     |            |
      |     |            int
      |     std::ofstream {aka std::basic_ofstream<char>}
preordine.cpp:18:10: note: candidate: ‘operator>>(int, int)’ (built-in)
   18 |     cout >> a[x].val >> " ";
      |     ~~~~~^~~~~~~~~~~
preordine.cpp:18:10: note:   no known conversion for argument 1 from ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} to ‘int’
In file included from /usr/include/c++/13/string:55,
                 from /usr/include/c++/13/bits/locale_classes.h:40,
                 from /usr/include/c++/13/bits/ios_base.h:41,
                 from /usr/include/c++/13/ios:44,
                 from /usr/include/c++/13/istream:40,
                 from /usr/include/c++/13/fstream:40,
                 from preordine.cpp:1:
/usr/include/c++/13/bits/basic_string.tcc:827:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
  827 |     operator>>(basic_istream<_CharT, _Traits>& __in,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.tcc:827:5: note:   template argument deduction/substitution failed:
preordine.cpp:18:18: note:   ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
   18 |     cout >> a[x].val >> " ";
      |                  ^~~
In file included from /usr/include/c++/13/istream:1106:
/usr/include/c++/13/bits/istream.tcc:975:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT&)’
  975 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
      |     ^~~~~~~~
/usr/include/c++/13/bits/istream.tcc:975:5: note:   template argument deduction/substitution failed:
preordine.cpp:18:18: note:   ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
   18 |     cout >> a[x].val >> " ";
      |                  ^~~
/usr/include/c++/13/istream:846:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char&)’
  846 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
      |     ^~~~~~~~
/usr/include/c++/13/istream:846:5: note:   template argument deduction/substitution failed:
preordine.cpp:18:18: note:   ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
   18 |     cout >> a[x].val >> " ";
      |                  ^~~
/usr/include/c++/13/istream:851:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char&)’
  851 |     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
      |     ^~~~~~~~
/usr/include/c++/13/istream:851:5: note:   template argument deduction/substitution failed:
preordine.cpp:18:18: note:   ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
   18 |     cout >> a[x].val >> " ";
      |                  ^~~
/usr/include/c++/13/istream:893:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT*)’
  893 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
      |     ^~~~~~~~
/usr/include/c++/13/istream:893:5: note:   template argument deduction/substitution failed:
preordine.cpp:18:18: note:   ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
   18 |     cout >> a[x].val >> " ";
      |                  ^~~
/usr/include/c++/13/istream:936:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char*)’
  936 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/istream:936:5: note:   template argument deduction/substitution failed:
preordine.cpp:18:18: note:   ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
   18 |     cout >> a[x].val >> " ";
      |                  ^~~
/usr/include/c++/13/istream:942:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char*)’
  942 |     operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/istream:942:5: note:   template argument deduction/substitution failed:
preordine.cpp:18:18: note:   ‘std::ofstream’ {aka ‘std::basic_ofstream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
   18 |     cout >> a[x].val >> " ";
      |                  ^~~
/usr/include/c++/13/istream:1096:5: note: candidate: ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&)’
 1096 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~
/usr/include/c++/13/istream:1096:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/istream: In substitution of ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ofstream<char>&; _Tp = int&]’:
preordine.cpp:18:18:   required from here
/usr/include/c++/13/istream:1096:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’

Cum funcționează evaluarea?