Lab2A

#include<iostream>
#include<cstring>

using namespace std;

struct Car{
char* brand;
int license_number;
int owner_id;
int price;
Car* next;

void add_car(const char* brand, int number, int id, int price);
void remove_brand(int owner_id);
void print();
};

Car* head = NULL;

int& price(const char* brand, int number, int owner_id);


int main(){
    Car* furki = head;
    furki->add_car("xd4dx", 21, 1, 1949);
    furki->add_car("xd3dx", 11, 11, 1949);
    furki->add_car("xdd2x", 222, 21, 1399);
    furki->add_car("xdd1x", 16, 166, 1299);
    furki->add_car("xdd1x", 162, 166, 1299);
    furki->add_car("xd5dx", 7, 15, 19913);
    furki->add_car("xd5dx", 71, 15, 1);
    furki->add_car("xd5dx", 73, 15, 19941);
    furki->add_car("xd5dx", 45, 15, 199144);


    furki->print();
    cout<< "--------------------------------"<<endl;
    furki->remove_brand(11);
    furki->print();
    cout<< "--------------------------------"<<endl;
    price("xd5dx", 71, 15) =120;
    price("xdd1x", 162, 166) = 9999999;
    price("xdd1x", 16111, 166);

    furki->print();


}

void Car::add_car(const char* brand, int number, int id, int price){
Car *ncar = new Car;

ncar->brand = new char[strlen(brand) + 1];
strcpy(ncar->brand, brand);
ncar->license_number = number;
ncar->owner_id = id;
ncar->price= price;

    if(head == NULL){
        head = ncar;
    }
    else if(head->license_number > ncar->license_number){
            Car *tempor = head;
            ncar->next = tempor;
            head = ncar;
        }

    else{
        Car *temp = head;
        while(temp->next&& temp->next->license_number < ncar->license_number){
            temp = temp->next;
        }
        Car* prev = temp->next;
        temp->next = ncar;
        ncar->next = prev;
    }

};
void Car::remove_brand(int owner_id){
    if(head->owner_id == owner_id){
        Car* temph = head;
        head = temph->next;
    }

    Car* temp = head;

    while(temp->next){
        if(temp->next->owner_id == owner_id){
                if(temp->next->next == NULL){
                    Car *nTemp = temp->next;
                    temp->next=NULL;
                    delete []nTemp->brand;
                    delete nTemp;
                    break;
                }

                else{
                    Car *nTemp2 = temp->next;
                    temp->next = temp->next->next;
                    delete []nTemp2->brand;
                    delete nTemp2;
                }
            }
        temp = temp->next;
    }
}
void Car::print(){
    Car *temp = head;
    while(temp){
        cout << "Brand: " << temp->brand << " License number:" << temp->license_number << " Owner ID:" << temp->owner_id << " Price:" << temp->price << endl;
        temp = temp->next;
    }
}


int& price(const char *brand, int number, int owner_id){
    Car *temp = head;
    Car *nTemp = head;
    int brandCounter =0;
    int lowestPrice = 0;


    while(temp){
        if(temp->license_number == number){
            return temp->price;
        }
        else if(!strcmp(temp->brand, brand)){
            brandCounter += 1;
            if(brandCounter == 1){
                lowestPrice = temp->price;
            }
            else{
                if(lowestPrice > temp->price){
                    lowestPrice = temp->price;
                }
            }
        }
        temp = temp->next;
    }

    if(brandCounter<4){
        head->add_car(brand, number, owner_id, 1000);
        return price(brand, number,owner_id);
    }
    else{
        while(nTemp){
            if(!strcmp(nTemp->brand, brand) && nTemp->price == lowestPrice){
                return nTemp->price;
            }
            nTemp = nTemp->next;
        }
    }
}