Compilare: user.cpp: In member function ‘void Hash::clear()’: user.cpp:28:35: 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(lista, 0x00, sizeof(lista)); ^ user.cpp: In function ‘bool f(int)’: user.cpp:39:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(len > v[i].size()) return false; ^ user.cpp:47:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = len; j < v[i].size(); j++){ ^ user.cpp:55:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(len > v[i].size()) return false; ^ user.cpp:67:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = len; j < v[i].size(); j++){ ^ user.cpp: In function ‘int main()’: user.cpp:84:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &n); ^