#include是类型为关键字的令牌吗? [英] Is #include a token of type keyword?

问题描述

在学习C的同时，我的第一个话题是令牌.当我看这段代码时，很容易获得图片.

While learning C I got my first topic which was tokens. When I look at this code is pretty easy to get the picture.

int main()
{
  int x, y, total;
  x = 10, y = 20;
  total = x + y;
  printf ("Total = %d \n", total);
}  

到目前为止一切都很好...现在，当我在这里看这个时:

so far so good... Now when I look at this one here:

#include <stdio.h>

int main()
{
    /* code */
    printf("Hello C world! \n");

    return 0;
}

我想知道#include <stdio.h>中的#include是否是令牌.如果是，应该是正确的关键字吗?

I wonder if the #include in #include <stdio.h> is a token. If yes, it should be a keyword right?

推荐答案

在线

#include <stdio.h>

#include是预处理程序指令. <stdio.h>是预处理器的附加信息.在这种情况下，它指定文件名stdio.h，其内容将完全包含在要编译的文件所在位置.

#include is a pre-processor directive. <stdio.h> is additional information for the pre-processor. In this case, it specifies a file name, stdio.h, whose contents are to be included at exactly that location of the file being processed for compilation.

包含预处理器指令的行由预处理器处理，并且从源代码创建目标代码时，编译器从不会看到它们.

The lines that contain pro-processor directives are processed by the pre-processor and are never seen by the compiler when creating object code from source code.

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