Eroare de compilare: user.cpp:3:1: error: ‘ifstream’ does not name a type ifstream f ("reactivi.in"); ^ user.cpp:4:1: error: ‘ofstream’ does not name a type ofstream g ("reactivi.out"); ^ user.cpp: In function ‘int main()’: user.cpp:17:3: error: ‘f’ was not declared in this scope f>>n; ^ user.cpp:30:5: error: ‘g’ was not declared in this scope g>>nrmin; return 0; ^ user.cpp:14:22: warning: unused variable ‘x’ [-Wunused-variable] { int i,j,nrmin,ok,n,x,y; ^ user.cpp:14:24: warning: unused variable ‘y’ [-Wunused-variable] { int i,j,nrmin,ok,n,x,y; ^