Compilare: user.cpp: In function ‘int main()’: user.cpp:10:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(n=0;s[n];++n) ++ap[s[n]]; ^ user.cpp:13:47: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(ok=1,j='a';j<='z'&&ok;++j) if(ap[j]==(n-i)/2+1) {c=j;ok=0;} ^ user.cpp:14:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(j='a';j<='z'&&ok;++j) if(ap[j]&&j!=ant) {c=j;ok=0;} ^ user.cpp:16:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] --ap[c]; ^