因为它是一个全球性的功能，你可以在任何地方使用它的程序，只需包含头文件和执行文件添加到项目。
Because it is a global function, you can use it anywhere in the program, just include the header file and add the implementation file to the project.
在理想情况下，头文件应该包含所有类定义、成员函数和变量。
This header file should ideally contain all the class definitions, member functions, and variables.
这个头文件包含共用的定义和过程。
This header file contains common definitions and procedures.
因此，头文件应该包含函数的原型和一个虚拟的函数定义。
Therefore, the header file should include the prototype of the function and also a dummy function definition.
清单8中的头文件包含要探查的函数和类的原型。
The header file in Listing 8 contains the prototype of the functions and classes you are probing.
client文件集中包含了IBMDirectory客户端库文件、头文件和实用工具。
The ldap.client file set contains the IBM Directory client libraries, header files, and utilities.
我们必须保证多次包含同一头文件不会引起该头文件定义的类和对象被多次定义。
We must ensure that including a header file more than once does not cause multiple definitions of the classes and objects that the header file defines.
我们必须保证多次包含同一头文件不会引起该头文件定义的类和对象被多次定义。
We must ensure that including a header file more than once does not cause multiple definitions of the classes and objects that the header file defines.
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