C语言 C - 如何包含保存在单独文件夹中的自己的标题
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C - how to include own headers kept in separate folder
提问by Kaiser
First of all I am pretty much a beginner, so I am not sure how to explain what I need but I'll give it a try. (I searched but couldn't find a complete answer).
首先，我几乎是一个初学者，所以我不知道如何解释我需要什么，但我会尝试一下。（我搜索但找不到完整的答案）。
I am learning C on my own and using Code Blocks.
我正在自己学习 C 并使用代码块。
I want to create my own mini-library of custom functions to use in my programs.
我想创建我自己的自定义函数迷你库以在我的程序中使用。
I have a folder called "C". Inside "C", I have a folder called "Exercises" where I do all the little projects from a book.
我有一个名为“C”的文件夹。在“C”中，我有一个名为“Exercises”的文件夹，我可以在其中完成一本书中的所有小项目。
Also inside "C", I wanna have another folder called "MyC" in which I would keep my own header files and the .c files containing the implementations of my custom functions. For example, these .h and .c would be saved in "MyC":
同样在“C”中，我想要另一个名为“MyC”的文件夹，我将在其中保存自己的头文件和包含自定义函数实现的 .c 文件。例如，这些 .h 和 .c 将保存在“MyC”中：
//test.h
//test.h
#ifndef _TEST_H
#define _TEST_H
int mySum(int, int);
#endif // _TEST_H
//test.c
//test.c
#include <stdio.h>
#include "test.h"
int mySum(int a, int b)
{
return a + b;
}
So now, what I'm trying to do is to be able to create a new project in "Exercises" and not having to bring a copy of both test.h and test.c into the project, but instead just #include my test.h and do something like:
所以现在，我想要做的是能够在“练习”中创建一个新项目，而不必将 test.h 和 test.c 的副本都带入项目中，而只是 #include my test .h 并执行以下操作：
//testMain.c
//testMain.c
#include <stdio.h>
#include <test.h>
int main(void)
{
printf("\n2 + 1 = %d", mySum(2, 1));
return 0;
}
I know that <> are for the standard headers, but quotes are for headers in the current folder, and that's what I don't want.
我知道 <> 用于标准标题，但引号用于当前文件夹中的标题，这就是我不想要的。
Is it possible to do this? How?
是否有可能做到这一点？如何？
I've read about going into settings>compiler and on Search Directories add the path where I have the header but didn't work. It gives me an error "undefined reference to 'mySum'" I tried quotes and brackets on the #include.
我已经阅读了有关进入设置>编译器并在搜索目录中添加我有标题但不起作用的路径的信息。它给了我一个错误“对'mySum'的未定义引用”我在#include 上尝试了引号和括号。
Can you guys please give a step-by-step for what it needs to be done to be able to do this?
你们能不能一步一步地说明需要做什么才能做到这一点？
采纳答案by teppic
You've added the header folder, so that's fine. You can #includeas normal. You'd be getting a 'file not found' error if it couldn't find your header.
你已经添加了标题文件夹，所以没问题。你可以#include像往常一样。如果找不到您的标题，您将收到“找不到文件”错误。
But you will also need to link against the object code in this directory, and you'll need to specify which object files to search for your functions. There should be a setting in your IDE to add compiler options, e.g. ../MyC/test.o. If you haven't already compiled the code in these functions, you'll need to specify the .c file instead.
但是您还需要链接到此目录中的目标代码，并且需要指定要搜索您的函数的目标文件。您的 IDE 中应该有一个设置来添加编译器选项，例如../MyC/test.o. 如果您尚未编译这些函数中的代码，则需要改为指定 .c 文件。
回答by pampeho
for headers
用于标题
If you want to move back one folder, do that: #include "../something.h".
如果您想移回一个文件夹，请执行以下操作：#include "../something.h"。
In your case, just do this: #include "../MyC/test.h"
在您的情况下，只需执行以下操作： #include "../MyC/test.h"
..simply means go back one directory.
..只是意味着返回一个目录。
If you dislike doing it like that, or you want to simply #include "test.h", you can do it using -Icompiler parameter, like this:
如果你不喜欢那样做，或者你想简单地#include "test.h"做，你可以使用-I编译器参数来做，像这样：
-I'../MyC/'
-I'../MyC/'
for c files
对于 c 文件
You need to do a simmiliar thing in compiler parameter.
您需要在编译器参数中做类似的事情。
gcc testMain.c ../MyC/test.c
gcc testMain.c ../MyC/test.c
Just remember that, ..means go back one directory!
请记住，这..意味着返回一个目录！
回答by Mosby
When you compile you need to include the -Ioption. For example:
编译时需要包含该-I选项。例如：
gcc -I<path-to-headers> <path-to>/test.c testMain.c -o test_driver
回答by Felipe Lavratti
Considering that "folder_to_code" contains test.hand test.c,
考虑到“folder_to_code”包含test.h和test.c，
you can add an include folder using the gcccommand:
您可以使用以下gcc命令添加包含文件夹：
gcc -I folder_to_code folder_to_code/test.c testMain.c -Wall -o program.exe
gcc -I folder_to_code folder_to_code/test.c testMain.c -Wall -o program.exe
This way you can add #include "test.h"to the code without problems.
这样您就可以#include "test.h"毫无问题地添加到代码中。
