哪些呢的#include＆LT;＆stdio.h中GT;真正做到在C程序 [英] what does #include <stdio.h> really do in a c program

问题描述

我在C编程一个新的学生，我是编码一些简单的程序Hello World的风格。

I am a new student in c programming and I was coding some simple programs "Hello world" style.

在所有这些节目我把＃包括LT＆;＆stdio.h中GT; 在顶部，但我不知道这是什么意思完全一样。我GOOGLE了它，我发现stdio.h中是具有命令为preprocessor一个文件，但什么是preprocessor？我想，当我写code，我编译它和我的code转变为一种形式，电脑可以读，然后我可以运行它。有人能向我解释这是该命令的用法？

In all of these programs I put #include<stdio.h> in the top but I am not sure what this means exactly. I googled it and I found that stdio.h is a file that has commands for the preprocessor, but what is preprocessor? I thought that when I write code, I compile it and my code transforms to a form that "computer" can read and then I can run it. Can somebody explain to me which is the usage of this command?

推荐答案

它看起来对 stdio.h中文件，并有效地复制它粘贴在这个地方的#include 语句。该文件包含的功能，所谓的函数原型，如的printf（）， scanf（）的，...所以该编译器知道什么是他们的参数和返回值。

It looks for the stdio.h file and effectively copy-pastes it in the place of this #include statements. This file contains so-called function prototypes of functions such as printf(), scanf(), ... so that compiler knows what are their parameters and return values.

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