Compilare: user.cpp: In function 'int main()': user.cpp:54: warning: comparison between signed and unsigned integer expressions user.cpp:56: warning: comparison between signed and unsigned integer expressions user.cpp:85: warning: comparison between signed and unsigned integer expressions user.cpp:87: warning: comparison between signed and unsigned integer expressions user.cpp:95: warning: use of 'll' length modifier with 'f' type character user.cpp:19: warning: 'b' may be used uninitialized in this function user.cpp:19: warning: 'a' may be used uninitialized in this function user.cpp:19: warning: 'max' may be used uninitialized in this function user.cpp:19: warning: 'min' may be used uninitialized in this function