C++中，判断某个自定义结构体是否在该结构体的vector中

demo1源码：

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

struct PushStreamIpAndPort
{
	std::string     ip="";
	int             port=0;
	// 重载相等运算符 == ：可不用
	bool operator==(const PushStreamIpAndPort &other) {
		return this->port == other.port && this->ip == other.ip;
	}
	
	PushStreamIpAndPort() {}

    // 重载构造函数去快速赋值：可不用
	PushStreamIpAndPort(const std::string t_ip, const int t_port) 
	{
		ip = t_ip;
		port = t_port;
	}
};

int main() {
	
	PushStreamIpAndPort a;
	PushStreamIpAndPort b;
	
	a.ip = "127.0.0.1";
	a.port = 10000;
	
	b.ip = "127.0.0.1";
	b.port = 10000;
	
	PushStreamIpAndPort c = PushStreamIpAndPort("127.0.0.1", 10001);
	
	vector<PushStreamIpAndPort> v;
	v.push_back(a);
	v.push_back(b);
	
//	if(a==b){
//		cout<<"相等"<<endl;
//	}else{
//		cout<<"不相等"<<endl;
//	}

	
	auto it = std::find(v.begin(), v.end(), c);
	if(it != v.end())
	{
		cout<<"在内部"<<endl;
	}
	else{
		cout<<"不在内部"<<endl;
	}
	
	return 0;
}

demo2源码：自动排除相同值

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

struct PushStreamIpAndPort
{
	std::string     ip="";
	int             port=0;
	// 重载相等运算符 ==
	bool operator==(const PushStreamIpAndPort &other) {
		return this->port == other.port && this->ip == other.ip;
	}
	
	PushStreamIpAndPort() {}
	PushStreamIpAndPort(const std::string t_ip, const int t_port) 
	{
		ip = t_ip;
		port = t_port;
	}
};

int main() {
	
	PushStreamIpAndPort a("127.0.0.1", 10000);
	PushStreamIpAndPort b("127.0.0.1", 10000);
	PushStreamIpAndPort c("127.0.0.1", 10001);
	
	vector<PushStreamIpAndPort> v;
	
	// 检查要添加的元素是否已经存在于 vector 中
	if (find(v.begin(), v.end(), a) == v.end()) {
		v.push_back(a);
	}
	if (find(v.begin(), v.end(), b) == v.end()) {
		v.push_back(b);
	}
	if (find(v.begin(), v.end(), c) == v.end()) {
		v.push_back(c);
	}
	
	for (const auto &elem : v) {
		cout << "IP: " << elem.ip << ", Port: " << elem.port << endl;
	}
	return 0;
}