Compilare: main.cpp: In function 'int main()': main.cpp:29:22: warning: array subscript has type 'char' [-Wchar-subscripts] int k=nivel[x]; ^ main.cpp:30:18: warning: array subscript has type 'char' [-Wchar-subscripts] k=nivel[x]+1; ^ main.cpp:31:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(nivel[y]<k) ^ main.cpp:33:20: warning: array subscript has type 'char' [-Wchar-subscripts] nivel[y]=k; ^ main.cpp:34:26: warning: array subscript has type 'char' [-Wchar-subscripts] prec[i]=poz[x]; ^ main.cpp:35:18: warning: array subscript has type 'char' [-Wchar-subscripts] poz[y]=i; ^