Compilare: In file included from /usr/include/c++/3.3/backward/iostream.h:31, from user.cpp:1: /usr/include/c++/3.3/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <sstream> instead of the deprecated header <strstream.h>. To disable this warning use -Wno-deprecated. user.cpp:5: warning: ISO C++ forbids declaration of `main' with no type user.cpp: In function `int main()': user.cpp:13: warning: converting to `long int' from `double' user.cpp:6: warning: unused variable `long int aux' user.cpp:6: warning: unused variable `long int valid' user.cpp:6: warning: unused variable `long int j' user.cpp:6: warning: unused variable `long int p' user.cpp:25:2: warning: no newline at end of file