Eroare de compilare: user.cpp:3:1: error: ‘ifstream’ does not name a type ifstream f("euclid2.in"); ^ user.cpp:4:1: error: ‘ofstream’ does not name a type ofstream g("euclid2.out"); ^ user.cpp: In function ‘int main()’: user.cpp:7:13: error: ‘f’ was not declared in this scope int a,b,r,T;f>>T; ^ user.cpp:9:9: error: ‘g’ was not declared in this scope f>>a>>b,g<<std::__gcd(a,b)<<"\n"; ^ user.cpp:7:9: warning: unused variable ‘r’ [-Wunused-variable] int a,b,r,T;f>>T; ^