Compilare: user.cpp:5:1: warning: "LONG_MAX" redefined In file included from /usr/include/c++/4.2/climits:50, from /usr/include/c++/4.2/bits/stl_algobase.h:67, from /usr/include/c++/4.2/algorithm:65, from user.cpp:1: /usr/lib/gcc/i486-linux-gnu/4.2.3/include/limits.h:85:1: warning: this is the location of the previous definition user.cpp: In function 'int main()': user.cpp:96: warning: comparison between signed and unsigned integer expressions