Compilare: main.cpp: In function 'int main()': main.cpp:129:17: warning: array subscript has type 'char' [-Wchar-subscripts] if(ind[x][y].empty()) ^ main.cpp:129:20: warning: array subscript has type 'char' [-Wchar-subscripts] if(ind[x][y].empty()) ^ main.cpp:130:21: warning: array subscript has type 'char' [-Wchar-subscripts] pairId[x][y] = ++pairs; ^ main.cpp:130:24: warning: array subscript has type 'char' [-Wchar-subscripts] pairId[x][y] = ++pairs; ^ main.cpp:131:14: warning: array subscript has type 'char' [-Wchar-subscripts] ind[x][y].push_back(i); ^ main.cpp:131:17: warning: array subscript has type 'char' [-Wchar-subscripts] ind[x][y].push_back(i); ^ main.cpp:140:16: warning: array subscript has type 'char' [-Wchar-subscripts] if(ap[x] == 0) ^ main.cpp:141:24: warning: array subscript has type 'char' [-Wchar-subscripts] charValue[x] = ++letters + pairs; ^ main.cpp:142:13: warning: array subscript has type 'char' [-Wchar-subscripts] ap[x]++; ^ main.cpp:194:22: warning: array subscript has type 'char' [-Wchar-subscripts] out << from[x].back() << " "; ^ main.cpp:195:15: warning: array subscript has type 'char' [-Wchar-subscripts] from[x].pop_back(); ^