C++ set

set

1.map是key-value的键值对，而set只有key，和vector的却别是set中的对象不能重复。

2.set操作

	vector<int>  v;

	v.push_back(1);
	v.push_back(1);
	v.push_back(2);
	v.push_back(2);
	v.push_back(3);
	v.push_back(3);
	cout << "v的大小是:" << v.size() << endl;

	set<int> s(v.begin(),v.end());
	cout << "s的大小是:" << s.size() << endl;


	//遍历
	set<int>::iterator it = s.begin();
	while (it!=s.end())
	{
		cout << *it++ << endl;
	}
	cout << "------------" << endl;
	//查找
	it = s.find(1);
	cout << *it << endl;


	cout << "------------" << endl;
	//删除
	s.erase(1);
	cout << s.size() << endl;

输出结果是：