Compilare: user.cpp: In function `int main()': user.cpp:35: warning: comparison between signed and unsigned integer expressions user.cpp:37: warning: comparison between signed and unsigned integer expressions user.cpp:39: warning: comparison between signed and unsigned integer expressions user.cpp:44: warning: comparison between signed and unsigned integer expressions user.cpp:50: warning: comparison between signed and unsigned integer expressions user.cpp:54: warning: comparison between signed and unsigned integer expressions user.cpp:38: warning: `int R' might be used uninitialized in this function user.cpp:48: warning: `int poz' might be used uninitialized in this function