c++ - Sorting strings in Vector algorithim not working -

c++ - Sorting strings in Vector algorithim not working -

i have vector of struct items has string inside. trying sort vector of items having string within items in alphabetical order... far have:

vector<item> sorter; std::sort(sorter.begin(), sorter.end(), sorthelp); //predcate function bool sorthelp(item const& one, item const& two) { homecoming one.type < two.type; }

*type string using sort

how alter predicate function sort strings alphabetically?

the next function case-insensitive compare on 2 std::strings without external libraries (it c++11 though).

bool caseinsensitivecompare(string s1, string s2) { locale loc; std::transform(s1.begin(),s1.end(),s1.begin(), [loc](char c){return std::toupper<char>(c,loc);}); std::transform(s2.begin(),s2.end(),s2.begin(), [loc](char c){return std::toupper<char>(c,loc);}); homecoming (s1 < s2); }

c++ function sorting