Compilare: main.cpp: In function 'void cpy(int*, int*)': main.cpp:11:24: warning: 'sizeof' on array function parameter 'a' will return size of 'int*' [-Wsizeof-array-argument] memset(a,0,sizeof(a)); ^ main.cpp:10:16: note: declared here void cpy(int a[], int b[]){ ^ main.cpp:11:22: 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(a,0,sizeof(a)); ^