How can I display all the elements stored in a vector?

Question

Consider:

class vehicle{
private:
    vector<string>carList;
public:
    void info();
    void displayCarInfo(vector<string>&carList);
}

void vehicle::info(){
    char a;
    string choice;
    do{
        cout<<"Please enter your car Reg number: ";
        cin >> carPlate;
        carList.push_back(carPlate);
        cout << "Do you want to continue add car info(y/n)?";
        cin >> choice;
    }while(choice == "y");
}

void vehicle::displayCarInfo(vector<string>&carList){
    for(int i = 0; i < 100; i++){
        cout << carList[i];
    }
}

//----------------------------------------------------------------
int main(){
    vehicle a;
    a.displayCarInfo(carList);
    return 0;
}

1. Errors are shown when displaying all the car list. How can I solve it?

2. And how can I retrieve information for a particular element inside carList?

Answer 1

1. You don't need to pass the vector as an argument to void displayCarInfo();:

    class Vehicle{ //<--- define classes starting with uppercase 
    private:
       vector<string>carList;
    public:
        void info();
        void displayCarInfo();
    }; //<----- you need a semicolon here
   

2. The termination condition should be the vector size.

    void vehicle::displayCarInfo() {
        for (std::size_t i = 0;  i < carList.size();  ++i) {
            cout << carList[i];
        }
    }
   

In main():

  int main(){
      vehicle a;
      a.displayCarInfo();
      return 0;
  }