Eroare de compilare: user.cpp:2:1: error: ‘ifstream’ does not name a type ifstream cin("permutari.in"); ^ user.cpp:3:1: error: ‘ofstream’ does not name a type ofstream cout("permutari.out"); ^ user.cpp: In function ‘void afisare(int)’: user.cpp:14:3: error: ‘cout’ was not declared in this scope cout<<st[i]<<" "; ^ user.cpp:15:2: error: ‘cout’ was not declared in this scope cout<<endl; ^ user.cpp: In function ‘void back(int)’: user.cpp:21:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if( valid(p) ) if(p==n) afisare(p); ^ user.cpp: In function ‘int main()’: user.cpp:27:2: error: ‘cin’ was not declared in this scope cin>>n; ^