Compilare: user.cpp: In function ‘int exp()’: user.cpp:36: warning: array subscript has type ‘char’ user.cpp:53: warning: array subscript has type ‘char’ user.cpp:34: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:87: warning: array subscript has type ‘char’ user.cpp: In function ‘int fac()’: user.cpp:124: warning: array subscript has type ‘char’ user.cpp: In function ‘int exp()’: user.cpp:20: warning: ‘VF’ may be used uninitialized in this function