Compilare: user.cpp: In function ‘void mult2(int*, int*, int*)’: user.cpp:54:24: 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:63:20: warning: unused variable ‘s’ [-Wunused-variable] int t = 0, s; ^