Compilare: user.cpp: In function `int valid(int)': user.cpp:46: warning: array subscript has type `char' user.cpp:47: warning: array subscript has type `char' user.cpp:48: warning: array subscript has type `char' user.cpp:50: warning: array subscript has type `char' user.cpp:57: warning: array subscript has type `char' user.cpp:58: warning: array subscript has type `char' user.cpp:59: warning: array subscript has type `char' user.cpp:61: warning: array subscript has type `char' user.cpp:32: warning: `int poz' might be used uninitialized in this function