Compilare: main.cpp: In function 'void creare(char*, int)': main.cpp:15:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(s);i++) ~^~~~~~~~~~ main.cpp:22:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(s)==k*4) ~~~~~~~~~^~~~~ main.cpp:24:21: warning: array subscript has type 'char' [-Wchar-subscripts] frv[s[i]]=2; ^ main.cpp:27:21: warning: array subscript has type 'char' [-Wchar-subscripts] frv[s[i]]=frv[s[i]]*4*nr; ^ main.cpp:27:31: warning: array subscript has type 'char' [-Wchar-subscripts] frv[s[i]]=frv[s[i]]*4*nr; ^ main.cpp: In function 'int main()': main.cpp:37:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(strlen(s)<n) ~~~~~~~~~^~ main.cpp:41:15: warning: array subscript has type 'char' [-Wchar-subscripts] frv[s[n-1]]++; ^ main.cpp:42:35: warning: array subscript has type 'char' [-Wchar-subscripts] g<<s[n-1]<<" "<<frv[s[n-1]]<<endl; ^