Compilare: user.cpp: In function ‘void fre(long long int)’: user.cpp:37:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] rz=rz+(f[ch]*(dr/4)+fc[ch]*(dr/4))/2; ^ user.cpp:37:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] rz=rz+(f[ch]*(dr/4)+fc[ch]*(dr/4))/2; ^ user.cpp:42:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] rz=rz+(f[ch]*(dr/2)+fc[ch]*(dr/2))/2; ^ user.cpp:42:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] rz=rz+(f[ch]*(dr/2)+fc[ch]*(dr/2))/2; ^ user.cpp:47:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] rz=rz+(f[ch]*(dr/4*3)+fc[ch]*(dr/4*3))/2; ^ user.cpp:47:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] rz=rz+(f[ch]*(dr/4*3)+fc[ch]*(dr/4*3))/2; ^ user.cpp: In function ‘int main()’: user.cpp:63:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[s[i]]++; ^ user.cpp:64:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] s1[i]=f[s[i]]; ^