Eroare de compilare: user.cpp:3:1: error: ‘ifstream’ does not name a type ifstream fin ("dreptunghi.in"); ^ user.cpp:4:1: error: ‘ofstream’ does not name a type ofstream fout ("dreptunghi.out"); ^ user.cpp: In function ‘int main()’: user.cpp:9:5: error: ‘fin’ was not declared in this scope fin>>n>>m; ^ user.cpp:19:5: error: ‘fout’ was not declared in this scope fout<<s+m; ^