Compilare: user.cpp: In function 'void readdata()': user.cpp:35: warning: array subscript has type 'char' user.cpp:35: warning: array subscript has type 'char' user.cpp:36: 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:39: warning: array subscript has type 'char' user.cpp:39: warning: array subscript has type 'char' user.cpp:40: warning: array subscript has type 'char' user.cpp:52: warning: array subscript has type 'char' user.cpp:52: warning: array subscript has type 'char' user.cpp:53: warning: array subscript has type 'char' user.cpp:54: warning: array subscript has type 'char' user.cpp:54: 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' /tmp/ccmw1bab.o: In function `readdata()': user.cpp:(.text+0x327): warning: the `gets' function is dangerous and should not be used.