Eroare de compilare: user.cpp:3:1: error: ‘ifstream’ does not name a type ifstream f("par.in"); ^ user.cpp:4:1: error: ‘ofstream’ does not name a type ofstream g("par.out"); ^ user.cpp: In function ‘int main()’: user.cpp:11:2: error: ‘f’ was not declared in this scope f>>n; ^ user.cpp:12:10: error: ‘g’ was not declared in this scope if(n%2) g<<-1; ^ user.cpp:23:3: error: ‘g’ was not declared in this scope g<<(a/2+b/2); ^ user.cpp:26:2: error: ‘g’ was not declared in this scope g.close(); ^