Compilare: user.cpp: In member function ‘int Hash::find(int, int)’: user.cpp:42:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p != 0 && val[p] != element) ^ user.cpp: In function ‘char nextch()’: user.cpp:10:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fi); ^