基于TCP协议的聊天程序的设计代码

这里给出一个简单的基于TCP协议的聊天程序的设计代码，其中客户端和服务器端均使用Python语言实现。

服务器端代码：

import socket

host = '127.0.0.1'
port = 9999

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind((host, port))
server_socket.listen()

print(f"Server is listening on {host}:{port}")

client_socket, client_address = server_socket.accept()
print(f"Connection established with {client_address[0]}:{client_address[1]}")

while True:
    data = client_socket.recv(1024).decode()
    if not data:
        break
    print(f"Received message: {data}")
    message = input("Enter message to send: ")
    client_socket.send(message.encode())

client_socket.close()
server_socket.close()

客户端代码：

import socket

host = '127.0.0.1'
port = 9999

client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect((host, port))

while True:
    message = input("Enter message to send: ")
    client_socket.send(message.encode())
    data = client_socket.recv(1024).decode()
    print(f"Received message: {data}")

client_socket.close()

以上代码仅为基础代码框架，可以根据实际需求进行修改和扩展。