Compilare: user.cpp: In function ‘int multiply(long long int (*)[2], long long int (*)[2])’: user.cpp:27:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int fib(int, long long int (*)[2])’: user.cpp:48:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^