Eroare de compilare: user.cpp:5:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main(){ ^ user.cpp: In function ‘int main()’: user.cpp:7:15: error: conflicting declaration ‘std::ofstream f’ ofstream f("cmmdc.out"); ^ user.cpp:6:14: error: ‘f’ has a previous declaration as ‘std::ifstream f’ ifstream f("cmmdc.in"); ^ user.cpp:14:5: error: ‘g’ was not declared in this scope g<<b; ^