c++ - 将对象插入集合

Question

我想像这样将 vector 插入到集合中:

set<vector<prmEdge> > cammini;
vector<prmEdge> vecEdge;
cammini.insert(vecEdge);

我有这样的编译错误:

prmPlanner.cpp:1285:   instantiated from here
/usr/include/c++/4.2/bits/stl_algobase.h:853: error: no match for ‘operator<’ in ‘__first1.__gnu_cxx::__normal_iterator<_Iterator, _Container>::operator* [with _Iterator = const prmEdge*, _Container = std::vector<prmEdge, std::allocator<prmEdge> >]() < __first2.__gnu_cxx::__normal_iterator<_Iterator, _Container>::operator* [with _Iterator = const prmEdge*, _Container = std::vector<prmEdge, std::allocator<prmEdge> >]()’
/usr/include/c++/4.2/bits/stl_algobase.h:855: error: no match for ‘operator<’ in ‘__first2.__gnu_cxx::__normal_iterator<_Iterator, _Container>::operator* [with _Iterator = const prmEdge*, _Container = std::vector<prmEdge, std::allocator<prmEdge> >]() < __first1.__gnu_cxx::__normal_iterator<_Iterator, _Container>::operator* [with _Iterator = const prmEdge*, _Container = std::vector<prmEdge, std::allocator<prmEdge> >]()’
make[1]: *** [prmPlanner.o] Errore 1

我该怎么办？ 有人可以帮帮我吗？？

非常感谢

Answer 1

它不知道如何比较 vector 。你应该提供 operator<对于 vector<prmEdge> (或 prmEdge 自动使用 std::lexicographical_compare 用于 vector )或使用 unordered_set如果您实际上不需要经过排序的 vector 集。