Compilare: user.cpp: In function ‘void read(int&)’: user.cpp:39:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, DIM, 1, stdin); ^ user.cpp:47:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, DIM, 1, stdin); ^ user.cpp: In function ‘void Set()’: user.cpp:82:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &t);//read( n ); read( m ); read( t ); ^