编译器选择
一般gcc和Clang选，gcc可以直接下MinGW，clang可以直接LLVM都是包含的，这里选择Clang，似乎编译速度比较快，适合我这种ap（acm批）调bug的时候快速编译比较爽。
下载（github）
windows可以选择clang+llvm-18.1.8-x86_64-pc-windows-msvc.tar.xz。也可以选择LLVM-18.1.8-win64.exe（编译好的二级制文件直接安装全部LLVM）推荐后者。
以及MinGWx86_64-14.2.0-release-win32-seh-msvcrt-rt_v12-rev0.7z Clang没有头文件要配合MinGw
添加环境变量。（如果系统本来环境很乱可能添加不了需要手动）
手动配置环境
以LLVM安装在 C:\Program Files\LLVM 为例，环境变量path里面添加 C:\Program Files\LLVM\bin
如果cmd 窗口中 输入clang -v 正常即可 系统环境变量配置完成
VSCode配置
系统配好了可能vscode还是不能，比如cmd中可以clang -v，vsc中的terminal确不行。
ctrl+，设置搜索terminal.integrated.env.windows”（Windows 系统），”terminal.integrated.env.osx”（Mac 系统），或 “terminal.integrated.env.linux”（Linux 系统）。修改json。
{
"terminal.integrated.env.windows": {
"PATH": "C:\\Program Files\\LLVM\\bin;${env:PATH}"
}
}XCPC配置
比赛环境一般为Ubuntu+gcc，vscode的插件一般只支持code runner。偶尔支持cph（平时可用）
gcc运行指令：
Windows
- 编译不指定 C++ 标准：powershell复制代码
g++ 1.cpp -o 1.exe - 编译并指定 C++23 标准：powershell复制代码
g++ 1.cpp -std=c++23 -o 1.exe - 运行生成的可执行文件：powershell复制代码
.\1.exe
Linux
- 编译不指定 C++ 标准：bash复制代码
g++ 1.cpp -o 1.out && .\1.out - 编译并指定 C++23 标准：bash复制代码
g++ 1.cpp -std=c++23 -o 1.out && .\1.out
clang运行指令
Windows
- 编译不指定 C++ 标准：powershell复制代码
clang++ 1.cpp -o 1.exe - 编译并指定 C++23 标准：powershell复制代码
clang++ 1.cpp -std=c++23 -o 1.exe - 运行生成的可执行文件：powershell复制代码
.\1.exe
Linux
- 编译不指定 C++ 标准：bash复制代码
clang++ 1.cpp -o 1.out && ./1.out - 编译并指定 C++23 标准：bash复制代码
clang++ 1.cpp -std=c++23 -o 1.out && ./1.out
clang缺少头文件
需要借助MinGw
clang++ 1.cpp -o 1.exe --target=x86_64-w64-mingw32 --sysroot="C:\Program Files\mingw64"可以直接在code runner里修改 json “code-runner.executorMap”
修改默认
"cpp": "cd $dir && g++ $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt" 为你想要的
"cpp": "cd $dir && g++ -std=c++23 $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",或者clang的（就不用修改环境变量）
"cpp": "cd $dir && clang++ $fileName -o $fileNameWithoutExt --target=x86_64-w64-mingw32 --sysroot=\"C:/Program Files/mingw64\" && $dir$fileNameWithoutExt",
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