Compilare: user.cpp: In function ‘void read()’: user.cpp:32:32: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same expression as the destination; did you mean to provide an explicit length? [-Wsizeof-pointer-memaccess] memset(p, 0, sizeof(p)); ^ user.cpp:26:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, maxC, stdin); ^