Compilare: user.cpp: In function ‘int main()’: user.cpp:31:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(t[c1[i]] != c2[i]) { ^ user.cpp:33:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] temp.ch1 = t[c1[i]]; ^ user.cpp:36:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] t[c1[i]] = c2[i]; ^ user.cpp:44:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(t[c1[i]] != c2[i]) { ^