Rezumat problemă

Produs_Matrice

#1313

Se citesc doua matrice din fisier . Sa se calculeze produsul lor .

Fișiere Jurj Flaviu-Andrei (jurjstyle) ușoară

Clasa 11 Probleme diverse Matematica

Rezolvă

Detalii

Problema	Produs_Matrice	Operații I/O	produs_matrice.in/produs_matrice.out
Limita timp	0.05 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64554822	Utilizator	croitoru stefan (Stefan742)
Fișier	produs_matrice.cpp	Dimensiune	585 B
Data încărcării	14 Mai 2026, 09:29	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

produs_matrice.cpp:3:13: error: variable ‘std::ifstream cin’ has initializer but incomplete type
    3 | ifstream cin("produs_matrice.in")
      |             ^
produs_matrice.cpp:4:1: error: expected ‘,’ or ‘;’ before ‘ofstream’
    4 | ofstream cout("produs_matrice.out")
      | ^~~~~~~~
produs_matrice.cpp: In function ‘int main()’:
produs_matrice.cpp:8:5: error: reference to ‘cin’ is ambiguous
    8 |     cin>>n>>m;
      |     ^~~
In file included from produs_matrice.cpp:1:
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
produs_matrice.cpp:3:10: note:                 ‘<typeprefixerror>cin’
    3 | ifstream cin("produs_matrice.in")
      |          ^~~
produs_matrice.cpp:8:10: error: ‘n’ was not declared in this scope
    8 |     cin>>n>>m;
      |          ^
produs_matrice.cpp:8:13: error: ‘m’ was not declared in this scope; did you mean ‘tm’?
    8 |     cin>>n>>m;
      |             ^
      |             tm
produs_matrice.cpp:11:9: error: reference to ‘cin’ is ambiguous
   11 |         cin>>a[i][j];
      |         ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
produs_matrice.cpp:3:10: note:                 ‘<typeprefixerror>cin’
    3 | ifstream cin("produs_matrice.in")
      |          ^~~
produs_matrice.cpp:11:14: error: ‘a’ was not declared in this scope
   11 |         cin>>a[i][j];
      |              ^
produs_matrice.cpp:9:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
    9 |     for(int i=1;i<=n;i++)
      |     ^~~
produs_matrice.cpp:12:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
   12 |         cin>>p;
      |         ^~~
produs_matrice.cpp:12:9: error: reference to ‘cin’ is ambiguous
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
produs_matrice.cpp:3:10: note:                 ‘<typeprefixerror>cin’
    3 | ifstream cin("produs_matrice.in")
      |          ^~~
produs_matrice.cpp:12:14: error: ‘p’ was not declared in this scope
   12 |         cin>>p;
      |              ^
produs_matrice.cpp:15:9: error: reference to ‘cin’ is ambiguous
   15 |         cin>>b[i][j];
      |         ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
produs_matrice.cpp:3:10: note:                 ‘<typeprefixerror>cin’
    3 | ifstream cin("produs_matrice.in")
      |          ^~~
produs_matrice.cpp:15:14: error: ‘b’ was not declared in this scope
   15 |         cin>>b[i][j];
      |              ^
produs_matrice.cpp:20:9: error: ‘c’ was not declared in this scope
   20 |         c[i][j]=0;
      |         ^
produs_matrice.cpp:22:22: error: ‘a’ was not declared in this scope
   22 |             c[i][j]+=a[i][k]*b[k][j];
      |                      ^
produs_matrice.cpp:22:30: error: ‘b’ was not declared in this scope
   22 |             c[i][j]+=a[i][k]*b[k][j];
      |                              ^
produs_matrice.cpp:24:11: error: ‘c’ was not declared in this scope
   24 |     cout<<c[i][j]<<'\n';
      |           ^
produs_matrice.cpp:24:16: error: ‘j’ was not declared in this scope
   24 |     cout<<c[i][j]<<'\n';
      |                ^

Cum funcționează evaluarea?