Compilare: user.cpp: In function ‘int main()’: user.cpp:52:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] viz[l][c][d] = viz[qu[p].x][qu[p].y][qu[p].z] + 1; ^ user.cpp:52:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] viz[l][c][d] = viz[qu[p].x][qu[p].y][qu[p].z] + 1; ^ user.cpp:52:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] viz[l][c][d] = viz[qu[p].x][qu[p].y][qu[p].z] + 1; ^