Compilare: user.cpp: In function ‘int flip(int, int, int (*)[16])’: user.cpp:94:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:98:13: warning: unused variable ‘i’ [-Wunused-variable] int m,n,i,j; ^ user.cpp:98:15: warning: unused variable ‘j’ [-Wunused-variable] int m,n,i,j; ^