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代写程序 控制结构

  Statements execute sequentially: The first statement in a function is executed first, followed by the second, and so on. Of course, few programsincluding the one we'll need to write to solve our bookstore problemcan be written using only sequential execution. Instead, programming languages provide various control structures that allow for more complicated execution paths. This section will take a brief look at some of the control structures provided by C++. Chapter 6 covers statements in detail.

语句总是顺序执行的:函数的第一条语句首先执行,接着是第二条,依次类推。当然,少数程序——包括我们将要编写的解决书店问题的程序——可以仅用顺序执行语句编写。事实上,程序设计语言提供了多种控制结构支持更为复杂的执行路径。本节将简要地介绍 C++ 提供的控制结构,第六章再详细介绍各种语句。

代写程序 关于注释

Before our programs get much more complicated, we should see how C++ handles comments. Comments help the human readers of our programs. They are typically used to summarize an algorithm, identify the purpose of a variable, or clarify an otherwise obscure segment of code. Comments do not increase the size of the executable program. The compiler ignores all comments.

在程序变得更复杂之前,我们应该明白C++如何处理注释。注释可以帮助其他人阅读程序,通常用于概括算法、确认变量的用途或者阐明难以理解的代码段。注释并不会增加可执行程序的大小,编译器会忽略所有注释。

代写程序 初窥输入/输出

1.2. A First Look at Input/Output

1.2. 初窥输入/输出

C++ does not directly define any statements to do input or output (IO). Instead, IO is provided by the standard library. The IO library provides an extensive set offacilities. However, for many purposes, including the examples in this book, one needs to know only a few basic concepts and operations.

C++ 并没有直接定义进行输入或输出(IO)的任何语句,这种功能是由标准库提供的。IO 库提供了大量的设施。然而,对许多应用,包括本书的例子而言,编程者只需要了解一些基本概念和操作。

Most of the examples in this book use the iostream library, which handles formatted input and output. Fundamental to the iostream library are two types named istream and ostream, which represent input and output streams, respectively. A stream is a sequence of characters intended to be read from or written to an IO device of some kind. The term "stream" is intended to suggest that the characters are generated, or consumed, sequentially over time.

本书的大多数例子都使用了处理格式化输入和输出的 iostream iostream 库的基础是两种命名为 istream 和 ostream 的类型,分别表示输入流和输出流。流是指要从某种 IO 设备上读入或写出的字符序列。术语“流”试图说明字符是随着时间顺序生成或消耗的。

代写程序 编写简单的 C++ 程序

  1.1. Writing a Simple C++ Program 1.1. 编写简单的 C++ 程序 Every C++ program contains one or more functions, one of which must be named main. A function consists of a sequence of statements that

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