Compilare: user.cpp: In function 'void in(int)': user.cpp:13: warning: array subscript has type 'char' user.cpp: In function 'int out()': user.cpp:19: warning: array subscript has type 'char' user.cpp: In function 'void ford_fulk(int, int)': 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:57: warning: array subscript has type 'char' user.cpp:63: warning: array subscript has type 'char' user.cpp:64: warning: array subscript has type 'char' user.cpp: In function 'int main()': user.cpp:78: warning: format '%d' expects type 'int*', but argument 2 has type 'char*'