Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:8:21: error: ‘strlen’ was not declared in this scope f>>s; n=strlen(s); ^ user.cpp:9:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(i=0;i<n;i++) fr[s[i]]++; ^ user.cpp:12:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fr[j]==(n-i+1)/2+1) c=j, w=0; ^ user.cpp:14:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fr[j] && j!=cv) c=j, w=0; ^ user.cpp:15:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] g<<c; fr[c]--; cv=c; ^