Compilare: user.cpp: In function ‘long long int inm(long long int (*)[4], long long int (*)[4], long long int (*)[4])’: user.cpp:19:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘long long int copiez(long long int (*)[4], long long int (*)[4])’: user.cpp:27:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^