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安装好必要的插件后（如C/C++，code runner等）默认生成task.json即可进行单文件运行
涉及到多文件情况可以修改task.json如下：

{
	"version": "2.0.0",
	"tasks": [
		{
			"type": "cppbuild",
			"label": "C/C++: g++.exe 生成活动文件",
			"command": "D:\\mingw64\\mingw64\\bin\\g++.exe",//g++.exe路径
			"args": [
				"-fdiagnostics-color=always",
				"-g",
				"${workspaceFolder}\\*.cpp",//这里修改为现在的所有cpp文件参与构建
				"-o",
				"${fileDirname}\\${fileBasenameNoExtension}.exe",
			],
			"options": {
				"cwd": "${fileDirname}"
			},
			"problemMatcher": [
				"$gcc"
			],
			"group": {
				"kind": "build",
				"isDefault": true
			},
			"detail": "编译器: \"D:\\mingw64\\mingw64\\bin\\g++.exe\""//g++.exe路径
		}
	]
}

除此方法还可使用cmake构建