从SFML套接字接收数据时的随机输出

Question

When running this code I am receiving completely random output when entering 'C' and nothing happening when entering 'S'.

Any help is greatly appreciated!

#include <iostream>
#include <string>
#include <SFML/Network.hpp>

int main()
{
sf::IpAddress ip = sf::IpAddress::getLocalAddress();
sf::TcpSocket socket;
char connectionType, buffer[2000];
std::size_t received;

std::cout << "C for client, S for server" << std::endl;
std::cin >> connectionType;

std::string packetText = "test";

if (connectionType == 'S')
{
    sf::TcpListener listener;
    listener.listen(2000);
    listener.accept(socket);
}
else if (connectionType == 'C')
{
    socket.connect(ip, 2000);
}

socket.send(packetText.c_str(), packetText.length() + 1);
socket.receive(buffer, sizeof(buffer), received);
std::cout << buffer << std::endl;
system("pause");
}

random output when entering C

Answer 1

You might want to handle that as an error. What is going on is the connect() , send() , and receive() are all failing but you aren't checking the return values. Additionally, you might want to zero out received and check that you actually received something before printing using the buffer. – Sean Cline