Rezumat problemă

Permutari

#123

Se citeşte un număr natural nenul n. Să se afişeze, în ordine lexicografică, permutările mulţimii {1,2,..,n}.

Fișiere Candale Silviu (silviu) ușoară

Clasa 11 Backtracking Elemente de combinatorică

Rezolvă

Detalii

Problema	Permutari	Operații I/O	permutari.in/permutari.out
Limita timp	0.5 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64236719	Utilizator	Gavrila Mihai (Mihai6421)
Fișier	permutari.cpp	Dimensiune	667 B
Data încărcării	24 Aprilie 2026, 14:29	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

permutari.cpp:4:14: error: extended character “ is not valid in an identifier
    4 | ifstream cin(“permutari.in”);
      |              ^
permutari.cpp:4:25: error: extended character ” is not valid in an identifier
    4 | ifstream cin(“permutari.in”);
      |                         ^
permutari.cpp:5:15: error: extended character “ is not valid in an identifier
    5 | ofstream cout(“permutari.out”);
      |               ^
permutari.cpp:5:26: error: extended character ” is not valid in an identifier
    5 | ofstream cout(“permutari.out”);
      |                          ^
permutari.cpp:8:49: error: extended character “ is not valid in an identifier
    8 | { for(int i = 1 ; i <= n ; i++) cout << x[i] << “ “; cout << endl;
      |                                                 ^
permutari.cpp:8:51: error: extended character “ is not valid in an identifier
    8 | { for(int i = 1 ; i <= n ; i++) cout << x[i] << “ “; cout << endl;
      |                                                   ^
permutari.cpp:4:14: error: ‘“permutari’ was not declared in this scope
    4 | ifstream cin(“permutari.in”);
      |              ^~~~~~~~~~
permutari.cpp:5:15: error: ‘“permutari’ was not declared in this scope
    5 | ofstream cout(“permutari.out”);
      |               ^~~~~~~~~~
permutari.cpp: In function ‘void afisare()’:
permutari.cpp:8:33: error: reference to ‘cout’ is ambiguous
    8 | { for(int i = 1 ; i <= n ; i++) cout << x[i] << “ “; cout << endl;
      |                                 ^~~~
In file included from permutari.cpp:1:
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
permutari.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout(“permutari.out”);
      |          ^~~~
permutari.cpp:8:41: error: ‘x’ was not declared in this scope
    8 | { for(int i = 1 ; i <= n ; i++) cout << x[i] << “ “; cout << endl;
      |                                         ^
permutari.cpp:8:49: error: ‘“’ was not declared in this scope
    8 | { for(int i = 1 ; i <= n ; i++) cout << x[i] << “ “; cout << endl;
      |                                                 ^
permutari.cpp:8:54: error: reference to ‘cout’ is ambiguous
    8 | { for(int i = 1 ; i <= n ; i++) cout << x[i] << “ “; cout << endl;
      |                                                      ^~~~
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
permutari.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout(“permutari.out”);
      |          ^~~~
permutari.cpp: In function ‘int valid(int)’:
permutari.cpp:12:1: warning: no return statement in function returning non-void [-Wreturn-type]
   12 | }
      | ^
permutari.cpp: In function ‘int main()’:
permutari.cpp:14:3: error: reference to ‘cin’ is ambiguous
   14 | { cin >> n; back(1);///incep generarea de la 1 return 0;
      |   ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
permutari.cpp:4:10: note:                 ‘std::ifstream cin’
    4 | ifstream cin(“permutari.in”);
      |          ^~~
permutari.cpp:14:13: error: ‘back’ was not declared in this scope
   14 | { cin >> n; back(1);///incep generarea de la 1 return 0;
      |             ^~~~

Cum funcționează evaluarea?