Compilare: user.cpp: In function ‘int main()’: user.cpp:40:82: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(k.x>=1 && k.x<=N && k.y>=1 && k.y<=N && k.z>=1 && k.z<=N && !a[k.x][k.y][k.z]){ ^ user.cpp:40:87: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(k.x>=1 && k.x<=N && k.y>=1 && k.y<=N && k.z>=1 && k.z<=N && !a[k.x][k.y][k.z]){ ^ user.cpp:40:92: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(k.x>=1 && k.x<=N && k.y>=1 && k.y<=N && k.z>=1 && k.z<=N && !a[k.x][k.y][k.z]){ ^ user.cpp:41:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[k.x][k.y][k.z]=a[b.x][b.y][b.z]+1; ^ user.cpp:41:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[k.x][k.y][k.z]=a[b.x][b.y][b.z]+1; ^ user.cpp:41:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[k.x][k.y][k.z]=a[b.x][b.y][b.z]+1; ^ user.cpp:41:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[k.x][k.y][k.z]=a[b.x][b.y][b.z]+1; ^ user.cpp:41:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[k.x][k.y][k.z]=a[b.x][b.y][b.z]+1; ^ user.cpp:41:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[k.x][k.y][k.z]=a[b.x][b.y][b.z]+1; ^ user.cpp:42:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] t[k.x][k.y][k.z]=i; ^ user.cpp:42:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] t[k.x][k.y][k.z]=i; ^ user.cpp:42:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] t[k.x][k.y][k.z]=i; ^