Compilare: user.cpp: In function ‘void read(int&)’: user.cpp:26:52: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, buffDIM, stdin), pos = 0; ^ user.cpp:32:52: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, buffDIM, stdin), pos = 0; ^ user.cpp: In function ‘void readData()’: user.cpp:38:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, buffDIM, stdin); ^