Compilare: user.cpp: In function ‘int main()’: user.cpp:57:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] x=e[a[i]];y=e[b[i]];z=e[c[i]]; ^ user.cpp:57:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] x=e[a[i]];y=e[b[i]];z=e[c[i]]; ^ user.cpp:57:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] x=e[a[i]];y=e[b[i]];z=e[c[i]]; ^ user.cpp:58:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] pairs+=ap[inv[x]][inv[y]][inv[z]]; ^ user.cpp:58:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] pairs+=ap[inv[x]][inv[y]][inv[z]]; ^ user.cpp:58:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] pairs+=ap[inv[x]][inv[y]][inv[z]]; ^