Rezumat problemă

Oglindire

#788

Se dă o matrice cu n linii şi m coloane şi elemente numere naturale. Să se oglindească toate liniile matricei care încep cu un număr prim și apoi să se afișeze matricea.

Consola Candale Silviu (silviu) medie

Clasa 9 Tablouri bidimensionale (matrice) Parcurgerea matricelor oarecare

Rezolvă

Detalii

Problema	Oglindire	Operații I/O	tastatură/ecran
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64319774	Utilizator	Taiatu Tiberiu (Taiat324)
Fișier	oglindire.cpp	Dimensiune	604 B
Data încărcării	29 Aprilie 2026, 13:45	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

oglindire.cpp:2:16: error: expected identifier before ‘;’ token
    2 | using namespace;
      |                ^
oglindire.cpp: In function ‘int main()’:
oglindire.cpp:8:13: error: ‘cin’ was not declared in this scope; did you mean ‘std::cin’?
    8 |             cin>>a[i][j];
      |             ^~~
      |             std::cin
In file included from oglindire.cpp:1:
/usr/include/c++/13/iostream:62:18: note: ‘std::cin’ declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
oglindire.cpp:19:17: error: ‘swap’ was not declared in this scope
   19 |                 swap(a[i][j],a[i][m+1-j]);
      |                 ^~~~
oglindire.cpp:19:17: note: suggested alternatives:
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/ostream:40,
                 from /usr/include/c++/13/iostream:41:
/usr/include/c++/13/bits/basic_string.h:3994:5: note:   ‘std::swap’
 3994 |     swap(basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~
In file included from /usr/include/c++/13/bits/exception_ptr.h:41,
                 from /usr/include/c++/13/exception:164,
                 from /usr/include/c++/13/ios:41:
/usr/include/c++/13/bits/move.h:189:5: note:   ‘std::swap’
  189 |     swap(_Tp& __a, _Tp& __b)
      |     ^~~~
/usr/include/c++/13/bits/exception_ptr.h:230:5: note:   ‘std::__exception_ptr::swap’
  230 |     swap(exception_ptr& __lhs, exception_ptr& __rhs)
      |     ^~~~
oglindire.cpp:23:13: error: ‘cout’ was not declared in this scope; did you mean ‘std::cout’?
   23 |             cout<<a[i][j]<<" ";
      |             ^~~~
      |             std::cout
/usr/include/c++/13/iostream:63:18: note: ‘std::cout’ declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
oglindire.cpp:24:9: error: ‘cout’ was not declared in this scope; did you mean ‘std::cout’?
   24 |         cout<<endl;
      |         ^~~~
      |         std::cout
/usr/include/c++/13/iostream:63:18: note: ‘std::cout’ declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
oglindire.cpp:24:15: error: ‘endl’ was not declared in this scope; did you mean ‘std::endl’?
   24 |         cout<<endl;
      |               ^~~~
      |               std::endl
/usr/include/c++/13/ostream:735:5: note: ‘std::endl’ declared here
  735 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~

Cum funcționează evaluarea?