选择调试器环境

从预定义的调试配置中进行选择，生成预定义launch.json文件,可能是空模板

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        
        {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            //设置为活动文件夹和活动文件名
            // "program": "${workspaceFolder}/leetcode100/06矩阵/a.out",  
            "program": "${fileDirname}/${fileBasenameNoExtension}",  

            //启动程序时传递给程序的命令行参数数组 
            "args": [],
            //默认不会添加任何断点，如果希望调试器在开始调试时停止在main方法，将stopAtEntry设置为true
            "stopAtEntry": true,
            "cwd": "${fileDirname}",
            "environment": [],
            "externalConsole": false,
            //指示调试器将连接到gdb或lldb
            "MIMode": "gdb",
            //调试器的路径，如果没有指定，将在计算机路径变量中搜索调试器，取决于MIMODE
            "miDebuggerPath": "/usr/bin/gdb",
            //指定要传递给调试器的附加参数
            "miDebuggerArgs": "",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                },
                {
                    "description": "Set Disassembly Flavor to Intel",
                    "text": "-gdb-set disassembly-flavor intel",
                    "ignoreFailures": true
                }
            ]
        }

    ]
}

举例

#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main() {
    vector<string> msg {"hello", "world", "from", "vs code"};

    for (const string& word : msg) {
        cout << word << " "; 
    }
    cout << endl;
}

(base) daichang@daichang:~/Desktop/Algorithm-training/gdb$ g++ helloworld.cc -o helloworld

开始调试，使用键盘快捷键F5

在Debug Console 显示调试器已启动并正在运行的输出，在最后一个cout语句完成之前，调试控制台不会出现任何输出。因为需要换行符来刷新缓冲区

可以使用变量缓冲区中的set alue来修改变量值等