How to modify a nested struct on a vector?

Question

I am working on a program that keeps inventory of vehicles, so I created a struct for it. It also needs to keep a list of the drivers, so I created a nested struct for that. Her

Answer 1

Example of your own code:

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

struct Vehicle {
    std::string License;
    std::string Place;
    int Capacity;
    struct Driver {
        std::string Name;
        int Code;
        int Id;
    }dude;
};

void AddVehicle(std::vector<Vehicle> &vtnewV)
{
    Vehicle newV;
    std::cout << "Enter license plate number: " << std::endl;
    std::cin >> newV.License;
    std::cout << "Enter the vehicle's ubication: " << std::endl;
    std::cin >> newV.Place;
    std::cout << "Enter the vehicle's capacity: " << std::endl;
    std::cin >> newV.Capacity;
    std::cout << "Enter the driver's name: " << std::endl;
    std::cin >> newV.dude.Name;
    std::cout << "Enter the driver's code: " << std::endl;
    std::cin >> newV.dude.Code;
    std::cout << "Enter the driver's identification number: " << std::endl;
    std::cin >> newV.dude.Id;
    vtnewV.push_back(newV);
};

int main()
{
    std::vector<Vehicle> listVehicle;
    AddVehicle(listVehicle);
    AddVehicle(listVehicle);

    for (auto& i : listVehicle)
    {
        std::cout << i.dude.Name << " got crabs" << std::endl;
    }

    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
    return 0;
}

Now, I need to know if there's a way to add the driver on another function, like, you ask for the vehicle info on one function and then ask for the driver's info on another.

I don't know if this is what you are after but there is a way better way to solve this than doing it this way, but without changing too much of your code, this will give you a hint:

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

struct Vehicle {
    std::string License;
    std::string Place;
    int Capacity;
    struct Driver {
        std::string Name;
        int Code;
        int Id;
    }driver;
};

Vehicle CreateVehicle()
{
    Vehicle vehicle;
    std::cout << "Enter license plate number: " << std::endl;
    std::cin >> vehicle.License;
    std::cout << "Enter the vehicle's ubication: " << std::endl;
    std::cin >> vehicle.Place;
    std::cout << "Enter the vehicle's capacity: " << std::endl;
    std::cin >> vehicle.Capacity;

    return vehicle;
};

Vehicle::Driver CreateDriver()
{
    Vehicle::Driver driver;
    std::cout << "Enter the driver's name: " << std::endl;
    std::cin >> driver.Name;
    std::cout << "Enter the driver's code: " << std::endl;
    std::cin >> driver.Code;
    std::cout << "Enter the driver's identification number: " << std::endl;
    std::cin >> driver.Id;

    return driver;
}

int main()
{
    std::vector<Vehicle> listVehicle;

    auto vehicle = CreateVehicle();
    auto driver = CreateDriver();
    vehicle.driver = driver;

    listVehicle.push_back(vehicle);


    for (auto& i : listVehicle)
    {
        std::cout << i.driver.Name << " got crabs" << std::endl;
    }

    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
    return 0;
}

Answer 2

How to modify a nested struct on a vector?

To set the driver of the N-th item from the vector of Vehicles, you'd use:

Vehicle::Driver driver_dude;
...
...
vtnewV[N-1].dude = driver_dude;

Answer 3

#include <iostream>
#include <vector>

using namespace std;

 struct Driver
 {
      string Name;
      int Code;
      int Id;
};

struct Vehicle
{
   string License;
   string Place;
   int Capacity;
   ///from my opinion driver should be declare like this
   Driver driver;

};

vector <Vehicle> vtnewV ;
/// the vector need to declare outside the void
/// else it will keep recreate a new vector
void AddVehicle()
{
   Vehicle newV;

   cout << "Enter license plate number: " << endl;
   cin >> newV.License;
   cout << "Enter the vehicle's ubication: " << endl;
   cin >> newV.Place;
   cout << "Enter the vehicle's capacity: " << endl;
   cin >> newV.Capacity;
   cout << "Enter the driver's name: " << endl;
   cin >> newV.driver.Name;
   cout << "Enter the driver's code: " << endl;
   cin >> newV.driver.Code;
   cout << "Enter the driver's identification number: " << endl;
   cin >> newV.driver.Id;
   vtnewV.push_back(newV);
};
void ShowInfo()
{
    for(int i= 0; i<vtnewV.size();i++)
    {
           cout<<vtnewV[].License<<newV.driver.Id;
           ///you need to use for loop to cout all that exist in vector info
    }

}
int main()
{
    AddVehicle();
    ShowInfo();
    return 0;
}

I have modify and added some comment to your code base by my own opinion hope that will solve you problem