Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:6:17: error: variable ‘std::ifstream fin’ has initializer but incomplete type ifstream fin("fractii.in"); ^ user.cpp:7:18: error: variable ‘std::ofstream fout’ has initializer but incomplete type ofstream fout("fractii.out"); ^ user.cpp:12:13: error: ‘rez’ was not declared in this scope rez=rez+v[i]; ^ user.cpp:13:38: error: expected ‘)’ before ‘;’ token for( int j=i+i;j<=n;j=j+i; ^ user.cpp:15:12: error: ‘rez’ was not declared in this scope fout<<rez*2+1; ^