将派生类中的对象插入到该对象的另一个实例中（使用vector.insert函数）C ++

Question

I am currently working through code which has a Road class. This has a vector of lanes and includes a lane class. The lane class has a vector of vehicles and each vehicle has its derived classes (Car, Motorcycle, Lorry). I would like a vehicle to be able to assess whether it can move into another lane, ie be inserted into another lane's vector of vehicles, safely (a car requires some safe distance, so I have already implemented how a vehicle knows if it is clear to switch lanes).

void Road::Simulate(double time)
{

for (unsigned int iLane = 0; iLane < getNLanes()-1; iLane++)
{
    for (unsigned int iV = 0; iV < getCurrentLane(iLane)->getNVehiclesinLane(); iV++)
    {
        std::cout<< " AllowedOvertake TEST "<<   getCurrentLane(iLane+1)->allowedOvertake(getCurrentLane(iLane)->getCurrentVehicle(iV)->getPosition(), getCurrentLane(iLane)->getCurrentVehicle(iV)->getMinDistance())<<std::endl;
        getCurrentLane(iLane+1)->setCanOvertake(allowedOvertake(getCurrentLane(iLane)->getCurrentVehicle(iV)->getPosition(), getCurrentLane(iLane)->getCurrentVehicle(iV)->getMinDistance()));

        if (getCurrentLane(iLane+1)->getCanOvertake() == true)
        {
            getCurrentLane(iLane+1)->insertVehicle(getCurrentLane(iLane)->getCurrentVehicle(iV), 0);
            delete getCurrentLane(iLane)->getCurrentVehicle(iV);
        }

    }
}
for (unsigned int iLane = 0; iLane < getNLanes(); iLane++)
{
    getCurrentLane(iLane)->Simulate(time);

} }

I loop over all the present lanes, except the last one as any vehicle in this lane cannot overtake. After looping over the vehicles contained in each lane, I have a function which returns a Boolean which confirms whether an overtake scenario can be executed. This is done in allowedOvertake() . If this returns true, I implement an insert function.

My issue/question: How can I make this ideology work, and whether it is sensible to have these setCanOvertake() and getCanOvertake() functions.

One possible solution could be to just pushback a new vehicle into the intended lane, but with the appropriate positions, velocities etc. However, I am not sure how to ensure that the vehicle being entered has the same type (Car, Lorry...) too.

Currently, I do not get any build errors if I exclude the insertVehicle() function, and I have vehicle motion being drawn using QPainter. However, with the insertVehicle() function, I do not get any build errors but I do get a crash once I run the project.

Any help would be appreciated, and apologies for any coding errors (I'm a keen, but very inexperienced C++ user).

For reference, I have the above functions' definitions as follows

bool Lane::allowedOvertake(double pos, double mindist)
{
    for (unsigned int iV = 0; iV < getNVehiclesinLane() - 1; iV++)
    {
        if ((fVehicles[iV]->getPosition() > pos - mindist)// If inside rear safety distance.
            || fVehicles[iV]->getPosition() < pos + mindist)// If inside front safety distance.
       {}//continue
    else {return false;}
    }
return true;
}

//IN Lane.h
bool getCanOvertake() const{return FREE_LANE_OVERTAKE;}
//IN Lane.h
void setCanOvertake(bool overtake = true){FREE_LANE_OVERTAKE = overtake;}

Answer 1

Apologies, I was under the impression I had referenced my insertVehicle() function definition.

void Lane::insertVehicle(Vehicle*v, int ielement) {

    Vehicle* vins = new Vehicle(v->getPosition(), v->getVelocity(), v->getAcceleration());

    for (unsigned int iDist = 0; iDist < fVehicles.size()+1; iDist++){fVehicles.insert(fVehicles.begin() + (ielement+1), vins);}
}