STL find

#include <iostream>
#include <vector>
#include<algorithm>


using namespace std;

class Person{
public:
	Person(){};
	Person(string name, int id):m_name(name), m_id(id){}
	string get_name()
	{
		return m_name;
	}
	int get_id() const
	{
		return m_id;
	}
	//const 对象的话需要调用常函数，否则会报cannot convert 'this' pointer from 'const class Person' to 'class Person &'
	bool operator==(const Person &p)
	{
		return this->m_id == p.get_id();
	}
private:
	string m_name;
	int m_id;
};



int main()
{
	Person p1("zhangsan", 2);
	Person p2("lisi", 5);
	Person p3("wangwu", 7);
	Person p4("zhaoliu", 3);

	vector<Person> vec;
	vec.push_back(p1);
	vec.push_back(p2);
	vec.push_back(p3);
	vec.push_back(p4);

	vector<Person>::iterator it;
	it = find(vec.begin(), vec.end(), p2);
	if (it != vec.end())
	{
		cout<<"find"<<endl;
	}
	return 0;
}