问VS代码的C++：无法启动调试-程序路径缺失或无效

EN

{

    "version": "0.2.0",
    "configurations": [

        {
            "name": "C++ Launch (GDB)",
            "type": "cppdbg",
            "request": "launch",
            "launchOptionType": "Local",
            "miDebuggerPath": "/usr/bin/gdb",
            "targetArchitecture": "x64",
            "program": "${workspaceRoot}/rectangle",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceRoot}",
            "environment": []
        },
        {
            "name": "C++ Attach (GDB)",
            "type": "cppdbg",
            "request": "launch",
            "launchOptionType": "Local",
            "miDebuggerPath": "/usr/bin/gdb",
            "targetArchitecture": "x64",
            "program": "${workspaceRoot}/rectangle",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceRoot}",
            "environment": []
        }
    ]
}

#include <iostream>
using namespace std;

int main()

{

    double length, width, area;

    cout << "Enter the length: ";
    cin >> length;
    cout << "Enter the width: ";
    cin >> width;
    area = length * width;
    cout << "The area is " << area << endl;
    return 0;

}