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代寫程序 控制結構

  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.

語句總是順序執行的:函數的第一條語句首先執行,接著是第二條,依次類推。當然,少數程序——包括我們將要編寫的解決書店問題的程序——可以僅用順序執行語句編寫。事實上,程序設計語言提供了多種控制結構支持更為復雜的執行路徑。本節將簡要地介紹 C++ 提供的控制結構,第六章再詳細介紹各種語句。

代寫程序 關于注釋

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.

在程序變得更復雜之前,我們應該明白C++如何處理注釋。注釋可以幫助其他人閱讀程序,通常用于概括算法、確認變量的用途或者闡明難以理解的代碼段。注釋并不會增加可執行程序的大小,編譯器會忽略所有注釋。

代寫程序 初窺輸入/輸出

1.2. A First Look at Input/Output

1.2. 初窺輸入/輸出

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++ 并沒有直接定義進行輸入或輸出(IO)的任何語句,這種功能是由標準庫提供的。IO 庫提供了大量的設施。然而,對許多應用,包括本書的例子而言,編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.

本書的大多數例子都使用了處理格式化輸入和輸出的 iostream iostream 庫的基礎是兩種命名為 istream 和 ostream 的類型,分別表示輸入流和輸出流。流是指要從某種 IO 設備上讀入或寫出的字符序列。術語“流”試圖說明字符是隨著時間順序生成或消耗的。

代寫程序 編寫簡單的 C++ 程序

  1.1. Writing a Simple C++ Program 1.1. 編寫簡單的 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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