Compilare: main.cpp: In function 'void creare(char*, int)': main.cpp:14:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(s);i++) ~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:28:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(strlen(s)<n) ~~~~~~~~~^~ main.cpp:32:26: warning: array subscript has type 'char' [-Wchar-subscripts] frv[s[n-1]]++; ^ main.cpp:33:35: warning: array subscript has type 'char' [-Wchar-subscripts] g<<s[n-1]<<" "<<frv[s[n-1]]<<endl; ^