Compilare: user.cpp: In function ‘int main()’: user.cpp:62:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(a[0]>0&&a[a[0]]==0)a[0]--; ^ user.cpp:75:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(a[0]>0&&a[a[0]]==0)a[0]--; ^ user.cpp:96:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(b[0]>0&&b[b[0]]==0)b[0]--; ^