在哪个文件里设置includePath

默认在用户主目录文件夹下的.vscode里面
还有一种你自己设置了工作区的，在工作区文件夹下的.vscode
文件名是c_cpp_properties.json ,因为我设置的是C和C++的include文件.。

怎么查找你系统的include所有目录

Windows直接搜索文件夹的，我们就不说了，这里说说linux下的方式：在shell里敲击gcc -v -E -x c++ - ,会给你列出系统里所有有h文件的目录

编辑方法

"includePath": [
                "${workspaceFolder}/**","/usr/include/","/usr/include/x86_64-pc-linux-gnu"
                ,"/usr/local/include","$GCC_HOME/include"
                ,"$GCC_HOME/lib/gcc/x86_64-pc-linux-gnu/7.5.0/include","/usr/local/gcc-7.5.0/include"
                ,"$GCC_HOME/lib/gcc/x86_64-pc-linux-gnu/7.5.0/include-fixed"
                ,"$GCC_HOME/lib/gcc/x86_64-pc-linux-gnu/7.5.0/include"
                ,"$GCC_HOME/lib/gcc/x86_64-pc-linux-gnu/7.5.0/include/cilk"
                ,"$GCC_HOME/lib/gcc/x86_64-pc-linux-gnu/7.5.0/include/sanitizer"
                ,"$GCC_HOME/lib/gcc/x86_64-pc-linux-gnu/7.5.0/include/ssp"
                ,"$GCC_HOME/lib/gcc/x86_64-pc-linux-gnu/7.5.0/include/"
                ,"$GCC_HOME/include/c++/7.5.0"
                ,"$GCC_HOME/include/c++/7.5.0/backward"
                ,"$GCC_HOME/include/c++/7.5.0/x86_64-pc-linux-gnu"
                ,"$GCC_HOME/include/c++/7.5.0/x86_64-pc-linux-gnu/bits"
                ,"$GCC_HOME/include/c++/7.5.0/x86_64-pc-linux-gnu/ext"
                ,"$GCC_HOME/include/c++/7.5.0"

includePath里面的项的写法是：includePath:[“绝对路径一”,“绝对路径二”,“绝对路径三”]

只要语法没错你可以写到一行里，我的Gcc主目录我用的环境变量设置了所以是GCC_HOME ,用$放前面引用

效果图