Compilare: user.cpp: In function ‘void write()’: user.cpp:83:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<ordine_comenzi.size() ; i++) ^ user.cpp: In function ‘void read()’: user.cpp:38:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:43:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&x); ^