Compilare: user.cpp: In function ‘int main()’: user.cpp:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:75: warning: dereferencing pointer ‘<anonymous>’ does break strict-aliasing rules /usr/include/c++/4.4/bits/stl_list.h:134: note: initialized from here