Compilare: user.cpp: In function ‘void read(int&)’: user.cpp:30:53: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {pos = 0; fread(buff, 1, buffDIM, stdin);} ^ user.cpp:37:53: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {pos = 0; fread(buff, 1, buffDIM, stdin);} ^ user.cpp: In function ‘int main()’: user.cpp:87:35: 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); ^