Compilare: user.cpp: In function ‘int move()’: user.cpp:72:12: warning: unused variable ‘next_dir’ [-Wunused-variable] int x, y, next_dir; ^ user.cpp: In function ‘int main()’: user.cpp:155:24: warning: unused variable ‘time’ [-Wunused-variable] int x, y, start, end, time, type; ^ user.cpp: In function ‘int mod(int, int)’: user.cpp:29:1: warning: control reaches end of non-void function [-Wreturn-type] } ^