C ++, multithreading and output handling

I want to create a chat system. It should write to you: and then whatever you type, and whenever you receive text from another user, just delete you: enter User: message and You: again.

Server:

        std::cin.ignore();
        std::thread t1(readData,&acceptedSocket);
        do{
            memset(buffer,0,sizeof(buffer));
            std::cout << "You: ";
            std::cin.getline(buffer,255);
            n = send(acceptedSocket,buffer,strlen(buffer),0);
        }while(n > 0);

      

        
        
        
      

    

Customer:

    std::cin.ignore();
    std::thread t1(readData,&connectingSocket);
    do{
        memset(buffer,0,sizeof(buffer));
        std::cout << "You: ";
        std::cin.getline(buffer,255);
        n = send(connectingSocket,buffer,strlen(buffer),0);
    }while(n > 0);

      

        
        
        
      

    

ReadData:

void readData(int *socketPointer){
    int connectingSocket = *socketPointer;
    char buffer[256];
    memset(buffer,0,sizeof(buffer));
    while(recv(connectingSocket,buffer,255,0)){
        std::cout << "\b\b\b\b\bUSER:" << buffer << std::endl << "You: ";
        memset(buffer,0,sizeof(buffer));
    }
}

      

        
        
        
      

    

Output:

Server:

USER:Hello
USER:How are u doing
Hi
You: You: I am fine
USER:gg
wp
You: You:

      

        
        
        
      

    

Customer:

You: Hello
You: How are u doing
USER:Hi
USER:I am fine
gg
You: USER:wp

      

        
        
        
      

    

Wannable Server Output:

USER:Hello
USER:How are u doing
You: Hi
You: I am fine
USER:gg
You: wp
You: 

      

        
        
        
      

    

Wannable Client output:

You: Hello
You: How are u doing
USER:Hi
USER:I am fine
You: gg
USER:wp
You:

      

        
        
        
      

    

It seems that you cannot put a new line character while cin is receiving the line on another thread. Thank!