Compilare: user.cpp: In function ‘void Inm(int (*)[3], int (*)[3], int (*)[3])’: user.cpp:9:22: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess] memset(c,0,sizeof(c)); ^ user.cpp: In function ‘int main()’: user.cpp:41:9: warning: unused variable ‘a’ [-Wunused-variable] int a, b,c; ^ user.cpp:41:12: warning: unused variable ‘b’ [-Wunused-variable] int a, b,c; ^ user.cpp:41:14: warning: unused variable ‘c’ [-Wunused-variable] int a, b,c; ^