Eroare de compilare: user.cpp:4:1: error: ‘ifstream’ does not name a type ifstream f; ^ user.cpp:5:1: error: ‘f’ does not name a type f.open("reactivi.in"); ^ user.cpp:6:1: error: ‘ofstream’ does not name a type ofstream g; ^ user.cpp:7:1: error: ‘g’ does not name a type g.open("reactivi.out"); ^ user.cpp: In function ‘int main()’: user.cpp:20:3: error: ‘f’ was not declared in this scope f>>n; ^ user.cpp:33:5: error: ‘g’ was not declared in this scope g>>nrmin; return 0; ^ user.cpp:17:22: warning: unused variable ‘x’ [-Wunused-variable] { int i,j,nrmin,ok,n,x,y; ^ user.cpp:17:24: warning: unused variable ‘y’ [-Wunused-variable] { int i,j,nrmin,ok,n,x,y; ^ user.cpp:35:14: error: expected ‘}’ at end of input g.close(); ^