Compilare: user.cpp: In function ‘void read(int&)’: user.cpp:36:39: 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:44:39: 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:78:31: 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:80:34: 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 ); ^ user.cpp:83:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &drum[i].st, &drum[i].dr, &drum[i].nr);//read( drum[i].st ); read( drum[i].dr ); read( drum[i].nr ); ^ user.cpp:92:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &G[i].x, &G[i].y, &G[i].k); Ord[i] = i;//read( G[i].x ); read( G[i].y ); read( G[i].k ); Ord[i] = i; ^