【Tools】VSCode软件设置头文件路径的方法

00. 目录

文章目录

01. 问题描述

Visual Studio Code在添加自定义头文件的时候遇到错误“fatal error: xxx.h: No such file or directory”。

02. 问题分析

我用 VSCode 来 Coding，这个编辑器需要自己配置头文件路径，就是自动建立一个 c_cpp_properties.json 文件来管理头文件路径，然后需要用哪些库就手动加上即可。

03. 问题解决

3.1 按F1启动指令输入框，输入 C/C++，选择第一项 Edit Configuration：

3.2 会自动生成一个 Json 文件

3.3 添加头文件路径

我们只需要再红框的 IncludePath 内加上需要的头文件路径即可，比如我的工程：

Windows平台如下

Linux平台如下

所以使用

#include "xxx.h"

的時候Visual studio code不会出现红线警示，因为这个时候intellisense已经知道这个路径了，但是编译器还不知道，所以编译的时候还是会报错。

04. 问题验证

无

05. 其它

Question Updated: I’m trying to build a c++ project on vscode using the C/C++ extension. The compiler complains about not finding header files (actually boost headers). I have included path to the root folder of boost, and Intellisense is also able to parse the header paths, but not the compiler. I checked the included header in my source is in the corresponding path in my filesystem. Is there any solution to make the compiler see the include headers?

This is my

c_cpp_properties.json

file:

{"configurations":[{"name":"Win32","includePath":["${workspaceFolder}/**","C:/Users/zz_ro/Documents/source/boost_1_70_0"],"defines":["_DEBUG","UNICODE","_UNICODE"],"windowsSdkVersion":"10.0.17763.0","compilerPath":"C:/mingw/bin/g++.exe","cStandard":"c11","cppStandard":"c++11","intelliSenseMode":"gcc-x64"}],"version":4}

and this is my

helloworld.cpp

file:

#include "boost/math/constants/constants.hpp"
#include "boost/multiprecision/cpp_dec_float.hpp"
#include <iostream>
#include <limits>
int main()
{
    using boost::multiprecision::cpp_dec_float_50;
    cpp_dec_float_50 seventh = cpp_dec_float_50(1) / 7;
    std::cout.precision(std::numeric_limits<cpp_dec_float_50>::digits10);
    std::cout << seventh << std::endl;
}

And here is the compiler output:

helloworld.cpp:1:46: fatal error: boost/math/constants/constants.hpp: No such file or directory
 #include "boost/math/constants/constants.hpp"
                                              ^
compilation terminated.
The terminal process terminated with exit code: 1

If I change my

tasks.json

from

{// See https://go.microsoft.com/fwlink/?LinkId=733558// for the documentation about the tasks.json format"version":"2.0.0","tasks":[{"label":"build hello world","type":"shell","command":"g++","args":["-g","helloworld.cpp","-o","helloworld"],"group":{"kind":"build","isDefault":true}}]}

to

{// See https://go.microsoft.com/fwlink/?LinkId=733558// for the documentation about the tasks.json format"version":"2.0.0","tasks":[{"label":"build hello world","type":"shell","command":"g++","args":["-g","-IC:\\Users\\zz_ro\\Documents\\source\\boost_1_70_0","helloworld.cpp","-o","helloworld"],"group":{"kind":"build","isDefault":true}}]}

by just manually passing the include path as an argument to

g++.exe

and the compilation will go through. It confuses me that in the tutorial (vscode tutorial) there is no mention about manually inserting include path to

g++.exe

via command line parameters, where all of these are supposed to be done by modifying the includePath variable in

c_cpp_property.json

. Did I misunderstand the tutorial or I didn’t set the includePath value properly?

05. 附录

参考：c_cpp_properties.json和task.json的作用对象

参考：Visual studio code 添加自定义头文件路径