c++ vector 添加和去重

#include 
#include 

using namespace std;

struct Track {
	int num;

};

vector sort_track(vector dets) {

	cout << "-------" << endl;
	for (int i = 0; i < dets.size(); i++) {
		cout << dets[i].num << endl;
	}

	//cout << dets.size() << endl;
	vector vtrack;
	for (int i = 0; i < dets.size(); i++) {
		for (int j = i + 1; j < dets.size(); j++) {
			if (dets[i].num == dets[j].num) {
				dets.erase(dets.begin() + j);
			}
		}
	}

	cout << "---------" << endl;
	for (int i = 0; i < dets.size(); i++) {
		cout << dets[i].num << endl;
	}


	return dets;
}


int main()
{
	vector track;
	Track t1, t2, t3, t4;
	t1.num = 1;
	t2.num = 2;
	t3.num = 2;
	t4.num = 1;

	track.push_back(t1);
	track.push_back(t2);
	track.push_back(t3);
	track.push_back(t4);


	cout << track.size() << endl;

	auto result = sort_track(track);

    //std::cout << "Hello World!n";
}