Compilare: user.cpp: In function 'int sol()': user.cpp:7: warning: array subscript has type 'char' user.cpp:7: warning: array subscript has type 'char' user.cpp:7: warning: array subscript has type 'char' user.cpp:9: warning: array subscript has type 'char' user.cpp:10: warning: array subscript has type 'char' user.cpp:10: warning: array subscript has type 'char' user.cpp:12: warning: array subscript has type 'char' user.cpp:13: warning: array subscript has type 'char' user.cpp:13: warning: array subscript has type 'char' user.cpp:15: warning: array subscript has type 'char' user.cpp:15: warning: array subscript has type 'char' user.cpp:16: warning: array subscript has type 'char' user.cpp: In function 'int main()': user.cpp:21: warning: converting to 'int' from 'double' user.cpp:24: warning: array subscript has type 'char'