Compilare: user.cpp: In function ‘void read()’: user.cpp:15:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[z[i]] = i; ^ user.cpp: In function ‘int compare(int)’: user.cpp:25:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (v[c[i1][i]] < v[c[i1+1][i]]) ^ user.cpp:25:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (v[c[i1][i]] < v[c[i1+1][i]]) ^ user.cpp:27:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if (v[c[i1][i]] > v[c[i1+1][i]]) ^ user.cpp:27:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if (v[c[i1][i]] > v[c[i1+1][i]]) ^