C++tcp客户端连接失败服务端显示连接成功

[醉卧南楼]

求助各位大神，在使用TCP连接的时候，服务器显示了连接，而客户端显示的是连接失败
找了半天没有发现错误所在，希望有大神帮忙讲解一下
服务端

WSADATA wsaData;
	int ret = WSAStartup(MAKEWORD(2, 2), &wsaData);
	if (ret != 0) {
		cout << "wsastartup error" << endl;
		return 0;
	}
	cout << "wsastartup success" << endl;

	SOCKET ListenSock;
	ListenSock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (ListenSock == INVALID_SOCKET) {
		cout << "ListenSock error" << endl;
		WSACleanup();
		return 0;
	}
	cout << "ListenSock success" << endl;

	SOCKADDR_IN server;
	server.sin_family = AF_INET;
	server.sin_port = htons(5000);
	server.sin_addr.S_un.S_addr = htonl(INADDR_ANY);

	int r = bind(ListenSock, (SOCKADDR*)&server, sizeof(server));
	if (r == SOCKET_ERROR) {
		cout << "bind error" << endl;
		WSACleanup();
		closesocket(ListenSock);
		return 0;
	}
	cout << "bind success" << endl;

	//监听
	if (listen(ListenSock, 5) == SOCKET_ERROR) {
		cout << "listen error" << endl;
		WSACleanup();
		closesocket(ListenSock);
		return 0;
	}
	cout << "listen success" << endl;

	SOCKET connetionSock;

	SOCKADDR_IN clientAddr;
	int clientAddrlen = sizeof(clientAddr);

	char recvtext[1024] = {'0'};
	char sendtext[1024] = {'0'};

	while (true) {
		connetionSock = accept(ListenSock, (SOCKADDR*)&clientAddr, &clientAddrlen);
		if (connetionSock == INVALID_SOCKET) {
			cout << "accept error" << endl;
			continue;
		}
		cout << "accept success!client add:" << inet_ntoa(clientAddr.sin_addr) << endl;
		if (recv(connetionSock, recvtext, strlen(recvtext), 0) == SOCKET_ERROR) {
			cout << "recv error" << endl;
			closesocket(connetionSock);
			closesocket(ListenSock);
			return 0;
		}
		cout << "recv success!recv's data:" << recvtext << endl;
		
		cout << "input send's data:" << endl;
		cin >> sendtext;
		if (send(connetionSock, sendtext, strlen(sendtext), 0) == SOCKET_ERROR) {
			cout << "send error" << endl;
			closesocket(connetionSock);
			closesocket(ListenSock);
			return 0;
		}
		cout << "send success" << endl;

		closesocket(connetionSock);
	}

客户端

WSADATA wsaData;
	int ret = WSAStartup(MAKEWORD(2, 2), &wsaData);
	if (ret != 0) {
		cout << "wsastartup error" << endl;
		return 0;
	}
	cout << "wsastartup success" << endl;

	SOCKET s;
	s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (s == SOCKET_ERROR) {
		cout << "socket error" << endl;
		WSACleanup();
		return 0;
	}
	cout << "socket success" << endl;

	SOCKADDR_IN serveradd;
	serveradd.sin_family = AF_INET;
	serveradd.sin_port = htons(5000);
	serveradd.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

	int rr = connect(s, (SOCKADDR*)&serveradd, sizeof(serveradd));
	if (rr = SOCKET_ERROR) {
		cout << "connect error:" << rr << endl;
		closesocket(s);
		WSACleanup();
		return 0;
	}
	cout << "connect success" << endl;
	cout << "input \"exit\" can exit this chat" << endl;

	char recvbuf[1024] = {'0'};
	char sendbuf[1024] = {'0'};

	while (true) {
		cout << "input send data:" << endl;
		cin >> sendbuf;
		if (send(s, sendbuf, 1024, 0) == SOCKET_ERROR) {
			cout << "send error" << endl;
			closesocket(s);
			WSACleanup();
			return 0;
		}
		if (!strcmp(sendbuf, "exit")) {
			cout << "already exit chat" << endl;
			break;
		}
		cout << "send success" << endl;

		int r = recv(s, recvbuf, 1024, 0);
		if (r == 0) {
			cout << "r==0" << endl;
		}
		else if (r = SOCKET_ERROR) {
			cout << "recv error" << endl;
		}
		recvbuf[r] = '\0';
		if (!strcmp(recvbuf, "exit")) {
			cout << "Server already exit chat" << endl;
			break;
		}
		cout << "Server:" << recvbuf << endl;
	}

运行结果
打开服务端

打开客户端



希望各路大神能帮忙讲解一下，不胜感激！

[棉猴]

正如1楼所说。
《C++Primer中文版第5版》P129
赋值运算的结果是它左侧运算对象，并且是一个左值。相应的，结果的类型就是左侧运算符的类型。
因此，

if (rr = SOCKET_ERROR)

等价于

if (-1)

故此，无论rr的返回值是多少（是否成功连接），都会显示连接错误！

[自信男孩]

if (rr = SOCKET_ERROR) {
        cout << "connect error:" << rr << endl;
        closesocket(s);
        WSACleanup();
        return 0;
    }

注意看一下if的判断表达式，是不是少一个=，应该是判断表达式，却写成了赋值表达式了吧