Compilare: user.cpp: In function 'int main()': user.cpp:53: warning: comparison between signed and unsigned integer expressions user.cpp:73: warning: comparison between signed and unsigned integer expressions user.cpp:92: warning: comparison between signed and unsigned integer expressions user.cpp:112: warning: comparison between signed and unsigned integer expressions user.cpp:123: warning: comparison between signed and unsigned integer expressions user.cpp:48: warning: 'p1' may be used uninitialized in this function user.cpp:48: warning: 'p2' may be used uninitialized in this function