Compilare: user.cpp: In function ‘int main()’: user.cpp:34:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(s[i])>lmax || (strlen(s[i])==lmax &&strcmp(s[i],maxi)==-1)) ^ user.cpp:34:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(s[i])>lmax || (strlen(s[i])==lmax &&strcmp(s[i],maxi)==-1)) ^ user.cpp:52:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr[s[i][k]]++; ^ user.cpp:54:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fr[s[j][k]]) fr[s[j][k]]--; ^ user.cpp:54:47: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fr[s[j][k]]) fr[s[j][k]]--; ^