Rezumat problemă

Preordine1

#753

Se consideră un arbore binar în care nodurile memorează numere naturale nenule. Să se afișeze valorile memorate în subarborele stâng al rădăcinii în urma parcurgerii în preordine.

Programul citește lista valorilor din arbore, dată în ordinea parcurgerii în preordine.

Fișiere Candale Silviu (silviu) ușoară

Clasa 11 Structuri de date arborescente Arbori binari

Rezolvă

Detalii

Problema	Preordine1	Operații I/O	preordine1.in/preordine1.out
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64425344	Utilizator	Calin Raluca (Raluxa27)
Fișier	preordine1.cpp	Dimensiune	606 B
Data încărcării	06 Mai 2026, 11:35	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

preordine1.cpp:4:10: error: conflicting declaration ‘std::ofstream cout’
    4 | ofstream cout("preordine1.out");
      |          ^~~~
preordine1.cpp:3:10: note: previous declaration as ‘std::ifstream cout’
    3 | ifstream cout("preordine1.in");
      |          ^~~~
preordine1.cpp: In function ‘void citire(nod*&)’:
preordine1.cpp:14:5: error: ‘cin’ was not declared in this scope
   14 |     cin>>x;
      |     ^~~
preordine1.cpp:2:1: note: ‘std::cin’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
    1 | #include <fstream>
  +++ |+#include <iostream>
    2 | using namespace std;
preordine1.cpp: In function ‘void preordine(nod*)’:
preordine1.cpp:28:14: error: no match for ‘operator<<’ (operand types are ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} and ‘int’)
   28 |          cout<<rad->info<<" ";
      |          ~~~~^~~~~~~~~~~
      |          |          |
      |          |          int
      |          std::ifstream {aka std::basic_ifstream<char>}
preordine1.cpp:28:14: note: candidate: ‘operator<<(int, int)’ (built-in)
   28 |          cout<<rad->info<<" ";
      |          ~~~~^~~~~~~~~~~
preordine1.cpp:28:14: note:   no known conversion for argument 1 from ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} to ‘int’
In file included from /usr/include/c++/13/string:54,
                 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 preordine1.cpp:1:
/usr/include/c++/13/bits/basic_string.h:4032:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
 4032 |     operator<<(basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:4032:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
In file included from /usr/include/c++/13/bits/ios_base.h:46:
/usr/include/c++/13/system_error:339:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const error_code&)’
  339 |     operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
      |     ^~~~~~~~
/usr/include/c++/13/system_error:339:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
In file included from /usr/include/c++/13/istream:41:
/usr/include/c++/13/ostream:554:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _CharT)’
  554 |     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:554:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:564:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, char)’
  564 |     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:564:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:570:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, char)’
  570 |     operator<<(basic_ostream<char, _Traits>& __out, char __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:570:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:581:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, signed char)’
  581 |     operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:581:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:586:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, unsigned char)’
  586 |     operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:586:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:645:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const _CharT*)’
  645 |     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:645:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
In file included from /usr/include/c++/13/ostream:880:
/usr/include/c++/13/bits/ostream.tcc:307:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const char*)’
  307 |     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/bits/ostream.tcc:307:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:662:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const char*)’
  662 |     operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:662:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:675:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const signed char*)’
  675 |     operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:675:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:680:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const unsigned char*)’
  680 |     operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:680:5: note:   template argument deduction/substitution failed:
preordine1.cpp:28:21: note:   ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
   28 |          cout<<rad->info<<" ";
      |                     ^~~~
/usr/include/c++/13/ostream:801:5: note: candidate: ‘template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&)’
  801 |     operator<<(_Ostream&& __os, const _Tp& __x)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:801:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/ostream: In substitution of ‘template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_ifstream<char>&; _Tp = int]’:
preordine1.cpp:28:21:   required from here
/usr/include/c++/13/ostream:801:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’

Cum funcționează evaluarea?