Chapter 10 结构体.pptVIP

* * * * * * * * * * * * * * * * * * * @ McGraw-Hill Education PROPRIETARY MATERIAL. ? 2007 The McGraw-Hill Companies, Inc. All rights reserved. No part of this PowerPoint slide may be displayed, reproduced or distributed in any form or by any means, without the prior written permission of the publisher, or used beyond the limited distribution to teachers and educators permitted by McGraw-Hill for their individual course preparation. If you are a student using this PowerPoint slide, you are using it without permission. Structures and Unions 学号 姓名 性别 年龄 计算机原理 C语言 操作系统 1 杜 明 男 20 90 83 82 2 王 涛 男 21 78 92 78 3 赵丽丽 女 21 89 72 66 4 任莹 女 21 78 95 90 5 …… 6 …… 思考：如何保存这种表格数据？ * * 10.1 Introduction Arrays represent a group of data items of same type. Cannot represent data of different types. Structures pack data of different types. represent a set of attributes 本章内容 结构体定义 结构体变量声明 存取结构体成员变量 结构体初始化 求结构体所占字节数 * * 10.2 Defining a Structure Unlike arrays, structures must be defined first for their format that may be used later to declare structure variables. 结构体必须先定义其格式，然后才能用它来声明结构体变量 这点与数组不同 * * 10.2 Defining a Structure Consider a book database consisting of book name, author, number of pages, and price. We can define a structure to hold this information as follows: struct book_bank char title[20]; char author[15]; int pages; float price; ; 一种用户自定义的类型 成员变量 结构体名 模版需以“；”结束 * * 10.2 Defining a Structure The above definition describes a format called template to represent information as shown below: array of 20 characters array of 15 characters integer float title author pages price * * 10.3 Declaring Structure Variables For example, the statement struct book_bank book1, book2, book3； declares book1, book2, book3 as variables of type struct book_bank Each one of these variables has four members as specified by the template. * * 10.3 Declaring Structure Variables The complete declaration might look like this: struct book_bank char title[20]; char autho