Compilare: user.cpp:81:2: warning: no newline at end of file user.cpp: In function 'char succesor(char)': user.cpp:14: warning: array subscript has type 'char' user.cpp:16: warning: array subscript has type 'char' user.cpp: In function 'char valid(char)': user.cpp:27: warning: array subscript has type 'char' user.cpp:27: warning: array subscript has type 'char' user.cpp: In function 'void tiparire()': user.cpp:45: warning: array subscript has type 'char' user.cpp: In function 'int main()': user.cpp:73: warning: array subscript has type 'char'