Borderou de evaluare (job #151075)

Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:12:31: error: ‘null_type’ was not declared in this scope user.cpp:12:31: note: suggested alternative: /usr/include/c++/4.6/ext/typelist.h:57:10: note: ‘__gnu_cxx::typelist::null_type’ user.cpp:12:122: error: template argument 2 is invalid user.cpp:12:125: error: invalid type in declaration before ‘;’ token user.cpp:23:9: error: request for member ‘insert’ in ‘s’, which is of non-class type ‘int’ user.cpp:25:28: error: request for member ‘find_by_order’ in ‘s’, which is of non-class type ‘int’ user.cpp:18:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:21:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]