多文件编译备忘，带注释的地方都需要注意！！！

launch.json文件

{// 使用 IntelliSense 了解相关属性。 // 悬停以查看现有属性的描述。// 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387"version": "0.2.0","configurations": [{"name": "g++.exe - 生成和调试活动文件","type": "cppdbg","request": "launch","program": "${fileDirname}/out.exe",//1、 文件目录   执行程序.exe路径"args": [],"stopAtEntry": false,"cwd": "${fileDirname}", //2、文件目录"environment": [],"externalConsole": true, //3、 显示控制台窗口"MIMode": "gdb","miDebuggerPath": "D:\\App\\Microsoft VS Code\\mingw64\\bin\\gdb.exe", //4、 gdb.exe路径"setupCommands": [{"description": "为 gdb 启用整齐打印","text": "-enable-pretty-printing","ignoreFailures": true},{"description": "将反汇编风格设置为 Intel","text": "-gdb-set disassembly-flavor intel","ignoreFailures": true}],"preLaunchTask": "C/C++: g++.exe 生成活动文件" //链接task.json，这个名称必须要与task.json中的label名称一致否则会编译出错}]
}

task.json文件

{"tasks": [{"type": "cppbuild","label": "C/C++: g++.exe 生成活动文件",  //1、 与launch.json中preLaunchTask的名称一致"command": "D:\\App\\Microsoft VS Code\\mingw64\\bin\\g++.exe", //2、 c++编译器g++.exe的路径"args": ["-fdiagnostics-color=always","-g","${fileDirname}/*.cpp", //"${file}", //多文件编译"-o","${fileDirname}/out.exe" //"${fileDirname}\\${fileBasenameNoExtension}.exe" //多文件编译成功生成的可执行文件.exe],"options": {"cwd": "${fileDirname}"},"problemMatcher": ["$gcc"],"group": {"kind": "build","isDefault": true},"detail": "调试器生成的任务。"}],"version": "2.0.0"
}