Compilare: user.cpp: In function ‘int termen(int&)’: user.cpp:41:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] return var[A[d-1]]; ^ user.cpp: In function ‘int main()’: user.cpp:84:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] var[c]=!var[c]; ^ user.cpp:84:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] var[c]=!var[c]; ^ user.cpp: In function ‘int tot(int&)’: user.cpp:58:1: warning: control reaches end of non-void function [-Wreturn-type] } ^