利用Java语言提供的Socket技术，建立一个C/S模式的应用，允许客户端用户输入2个整数，服务器端接收这2个整数，并计算出它们的和、差、积、商，最后送回客户端-Socket using the Java language provides technology to build a C/S mode application that allows client users to input 2 integers, the server receives these two integers and compute their sum, difference, product, business, and finally back to Clients