Compilare: user.cpp: In function 'void df(int, int, int, int)': user.cpp:23: warning: array subscript has type 'char' user.cpp: In function 'void df2(char, char)': user.cpp:39: warning: array subscript has type 'char' user.cpp:40: warning: array subscript has type 'char' user.cpp:40: warning: array subscript has type 'char' user.cpp:42: warning: array subscript has type 'char' user.cpp:42: warning: array subscript has type 'char' user.cpp:44: warning: array subscript has type 'char' user.cpp:46: warning: array subscript has type 'char' user.cpp:50: warning: array subscript has type 'char' user.cpp:50: warning: array subscript has type 'char' user.cpp: In function 'void solve2(char, char)': user.cpp:79: warning: array subscript has type 'char' user.cpp:79: warning: array subscript has type 'char' user.cpp:84: warning: array subscript has type 'char' user.cpp:84: warning: array subscript has type 'char' user.cpp:84: warning: array subscript has type 'char' user.cpp:85: warning: array subscript has type 'char' user.cpp:85: warning: array subscript has type 'char' user.cpp:85: warning: array subscript has type 'char' user.cpp: In function 'void solve(char, char)': user.cpp:109: warning: array subscript has type 'char' user.cpp:110: warning: array subscript has type 'char' user.cpp: In function 'int main()': user.cpp:125: warning: array subscript has type 'char'