tailieunhanh - Understanding Statements

Hiểu cáo tuyên bố là một lệnh thực hiện một hành động. Thông cáo được tìm thấy bên trong các phương pháp. Bạn sẽ tìm hiểu thêm về phương pháp trong Chương 3, "Phương Pháp Viết và Phạm vi áp dụng," nhưng bây giờ, nghĩ ra một phương pháp như là một trình tự đặt tên của báo cáo bên trong một lớp học. | Understanding Statements A statement is a command that performs an action. Statements are found inside methods. You ll learn more about methods in Chapter 3 Writing Methods and Applying Scope but for now think of a method as a named sequence of statements inside a class. Main which was introduced in the previous chapter is an example of a method. Statements in C must follow a well-defined set of rules. These rules are collectively known as syntax. In contrast the specification of what statements do is collectively known as semantics. One of the simplest and most important C syntax rules states that you must terminate all statements with a semicolon. For example without its terminating semicolon the following statement won t compile Hello World TIP C is a free format language which means that white space such as a space character or a new line is not significant except as a separator. In other words you are free to lay out your statements in any style you choose. A simple consistent layout style makes a program easier to read and understand. The trick to programming well in any language is learning its syntax and semantics and then using the language in a natural and idiomatic way. This approach makes your programs readable and easy to modify. In the chapters throughout this book you ll see examples of the most important C .