Eroare de compilare: user.cpp:1:21: error: fstream.h: No such file or directory user.cpp:13: error: ‘ofstream’ does not name a type user.cpp: In function ‘void read_data()’: user.cpp:19: error: ‘ifstream’ was not declared in this scope user.cpp:19: error: expected ‘;’ before ‘f’ user.cpp:20: error: ‘f’ was not declared in this scope user.cpp: In function ‘void drum(int, int, int)’: user.cpp:46: error: ‘g’ was not declared in this scope user.cpp:54: error: ‘g’ was not declared in this scope user.cpp:54: error: ‘endl’ was not declared in this scope user.cpp:61: error: ‘g’ was not declared in this scope user.cpp:61: error: ‘endl’ was not declared in this scope user.cpp:45: warning: unused variable ‘i’ user.cpp: In function ‘void solve()’: user.cpp:84: error: ‘g’ was not declared in this scope