Compilare: user.cpp: In member function ‘matrice& matrice::operator*(matrice)’: user.cpp:17:17: warning: reference to local variable ‘rez’ returned [-Wreturn-local-addr] matrice rez; ^ user.cpp: In function ‘int main()’: user.cpp:44:20: warning: format ‘%d’ expects a matching ‘int*’ argument [-Wformat=] scanf("%d%d",&n); ^ user.cpp:55:33: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%lld",fib(n-1,f)); ^ user.cpp:42:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in","r",stdin); ^ user.cpp:43:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.out","w",stdout); ^ user.cpp:44:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n); ^