Chapter 10 Topics Built-In Simple Types s Integral and Floating Point Data Types s Using Combined Assignment Operators s Prefix and Postfix Forms of Increment and Decrement Operators Additional C++ Operator
要通过Wi n s o c k建立通信,必须了解如何利用指定的协议为工作站定址。本章将一一说明 Wi n s o c k支持的协议以及各协议如何把一个指定家族的地址解析成网络上一台具体的机器。 Winsock 2引入了几个新的、与协议无关的函数,它们可和任何一个地址家族一起使用;但是 大多数情况下,各协议家族都有自己的地址解析机制,要么通过一个函数,要么作为一个投 给g e t s o c k o p t的选项。本章只讲解各协议组成地址结构时所需的一些基本知识
string is composed ofn(20) characters in an orderly sequence recorded as s:“c1C2C3…Cn” S is string name c123n is value is a character n is string length Such as,S=“ TSinghua University
Teaching madel Target language input Engagement Model of classroom Learner's active seard Implementation Learner's comprehensive output Negative input from teacher
A clotheshorse讲究穿戴的人 one' s brain child某人的主意,某人想出来的 Princess Diana was a real clotheshorse. It's hard to imagine how much 等同于 one's original idea she had spent on clothes
4. 广义笛卡尔积 (Extended Cartesian Product Extended Cartesian Product) z R – n目关系,k1个元组 z S – m目关系,k2个元组 z R×S – 列:(n+m)列的元组的集合 z 元组的前n列是关系R的一个元组 z 后m列是关系S的一个元组 – 行:k1×k2个元组