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:82:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] var[c]=!var[c]; ^ user.cpp:82:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] var[c]=!var[c]; ^