#include <iostream>
using namespace std;int main()
{cout << "hello world" << endl;for(int i = 0;i < 100;i++){cout << i << endl;}return 0;
}

gcc -v -E -x c++ -

{// See https://go.microsoft.com/fwlink/?LinkId=733558// for the documentation about the tasks.json format"version": "2.0.0","tasks": [{"label": "build","type": "shell","command": "g++","args": ["-g",    //表示在生成的可执行文件中加入调试信息,如果你要调试程序,-g参数必不可少"main.cpp"],"presentation": {"reveal": "never"},"problemMatcher": ["$gcc"]}]
}

{// 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": "gdb c++","type": "cppdbg","request": "launch","program": "${workspaceFolder}/a.exe","args": [],"stopAtEntry": false,"cwd": "${workspaceFolder}","environment": [],"externalConsole": true,"MIMode": "gdb","miDebuggerPath": "C:/Program Files/mingw-w64/x86_64-7.3.0/mingw64/bin/gdb.exe","setupCommands": [{"description": "Enable pretty-printing for gdb","text": "-enable-pretty-printing","ignoreFailures": true}]}]
}

{// 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": "gdb c++","type": "cppdbg","request": "launch","program": "${workspaceFolder}/a.exe","args": [],"stopAtEntry": false,"cwd": "${workspaceFolder}","environment": [],"externalConsole": true,"MIMode": "gdb","miDebuggerPath": "C:/Program Files/mingw-w64/x86_64-7.3.0/mingw64/bin/gdb.exe","setupCommands": [{"description": "Enable pretty-printing for gdb","text": "-enable-pretty-printing","ignoreFailures": true}],"preLaunchTask": "build"}]
}

, "preLaunchTask": "build"