Compilare: main.cpp: In function 'void ovy()': main.cpp:50:44: warning: array subscript has type 'char' [-Wchar-subscripts] if(v[i]>'a'&&v[i]<='z')if(ok)f[v[i]]+=q*sn;else f[v[i]]+=sn; ^ main.cpp:50:63: warning: array subscript has type 'char' [-Wchar-subscripts] if(v[i]>'a'&&v[i]<='z')if(ok)f[v[i]]+=q*sn;else f[v[i]]+=sn; ^ main.cpp:45:21: warning: unused variable 'q' [-Wunused-variable] int n=strlen(v),q=0,sn; ^ main.cpp:45:25: warning: 'sn' may be used uninitialized in this function [-Wmaybe-uninitialized] int n=strlen(v),q=0,sn; ^~