Compilare: user.cpp: In function 'void readdata()': user.cpp:34: warning: array subscript has type 'char' user.cpp:34: warning: array subscript has type 'char' user.cpp:35: warning: array subscript has type 'char' user.cpp:37: warning: array subscript has type 'char' user.cpp:37: warning: array subscript has type 'char' user.cpp:43: warning: array subscript has type 'char' user.cpp:43: warning: array subscript has type 'char' user.cpp:44: warning: array subscript has type 'char' user.cpp:56: warning: array subscript has type 'char' user.cpp:56: warning: array subscript has type 'char' user.cpp:57: warning: array subscript has type 'char' user.cpp:59: warning: array subscript has type 'char' user.cpp:59: warning: array subscript has type 'char' user.cpp:65: warning: array subscript has type 'char' user.cpp:65: warning: array subscript has type 'char' user.cpp:66: warning: array subscript has type 'char' /tmp/ccFIDSqp.o: In function `readdata()': user.cpp:(.text+0x329): warning: the `gets' function is dangerous and should not be used.