# Debug C++ on Ubuntu with Visual Studio Code

### Requirements

* g++ (by installation of the development package [`build-essential`](https://linuxconfig.org/how-to-install-g-the-c-compiler-on-ubuntu-20-04-lts-focal-fossa-linux))
* [C/C++ Extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools)
* [CodeLLDB Extension](https://marketplace.visualstudio.com/items?itemName=vadimcn.vscode-lldb)

### Instructions 

Step 1: Edit `launch.json` file

```
{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "lldb launch",
      "type": "lldb",
      "request": "launch",
      "program": "${fileDirname}/${fileBasenameNoExtension}",
      "args": [],
      "preLaunchTask": "C/C++: g++ build active file"
    }
  ]
}
```

Step 2: Edit `tasks.json` file

```
{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "cppbuild",
            "label": "C/C++: g++ build active file",
            "command": "/usr/bin/g++",
            "args": [
                "-fdiagnostics-color=always",
                "-std=c++17",                
                "-g",
                "${file}",
                "-o",
                "${fileDirname}/${fileBasenameNoExtension}"
            ],
            "options": {
                "cwd": "${workspaceFolder}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "detail": "Task generated by Debugger."
        }
    ]
}
```

Step 3: Create and edit `main.cpp` file 

```
#include <iostream>
#include <vector>
using namespace std;

int main(){
    string s = "Hello World";
    vector<int> v = {0, 1, 2, 3};
    for(auto item: v){
        cout << "Hello World " << item << endl;
    }
    return 0;
}
```

Step 4: Run & Debug

Click Run & Debug (Ctrl+Shift+D), then click Start Debugging (F5)

## References

* https://code.visualstudio.com/docs/cpp/config-clang-mac
* https://stackoverflow.com/questions/64568431/vs-code-debugger-not-operational-on-macos