Alcoholic Drink

#include <iostream>
#include <cstring>
using namespace std;
class AlcoholicDrink {
protected:
    char name[100];
    char country[100];
    float percentAlch;
    float basePrice;
public:
    static int discount;
    AlcoholicDrink(){
     strcpy(name,"");
     strcpy(country,"");
     percentAlch=0;
     basePrice=0;
    }
    AlcoholicDrink(float percentAlch1, char *name1,char *country1,float basePrice1){
       strcpy(name,name1);
     strcpy(country,country1);
     percentAlch=percentAlch1;
     basePrice=basePrice1;
    }
    virtual ~AlcoholicDrink(){}
   virtual float computePrice()=0;

   bool operator <(AlcoholicDrink &ad){
    if(this->computePrice()<ad.computePrice()){
        return true;
    }else{
    return false;
    }
   }
   static void changeDiscount(int d){
   discount=d;
   }
   static void total(AlcoholicDrink** ad, int n){
    float suma=0;
    for(int i=0;i<n;i++){
        suma+=ad[i]->computePrice();
    }
    cout<<"Total price: "<<suma<<endl;
    cout<<"Total price with discount: "<<suma-suma*discount/100<<endl;
   }
   friend ostream& operator<<(ostream &out,AlcoholicDrink &ad){
   out<<ad.name<<" "<<ad.country<<" "<<ad.computePrice();
   return out;
   }
};
int AlcoholicDrink::discount=5;
class Beer:public AlcoholicDrink{
 private:
     int bar_wheat;
 public:
    Beer(){
    bar_wheat=0;
    }
    Beer(float percentAlch1, char *name1,char *country1,float basePrice1,int bar_wheat1)
    :AlcoholicDrink(percentAlch1,name1,country1,basePrice1){
     bar_wheat=bar_wheat1;
    }
     float computePrice(){
     if(strcmp(country,"Germany")==0){
        if(bar_wheat==0){
            return basePrice+basePrice*0.05+basePrice*0.1;
        }else{
         return basePrice+basePrice*0.05;
        }
     }else{
         if(bar_wheat==0){
            return basePrice+basePrice*0.1;
        }else{
         return basePrice;
        }
     }
    }

};
class Wine:public AlcoholicDrink{
 private:
     int year;
     char grapes[20];
 public:
    Wine(){
    year=0;
    strcpy(grapes,"");
    }
    Wine(float percentAlch1,char *name1,char *country1,float basePrice1,int year1, char *grapes1)
    :AlcoholicDrink(percentAlch1,name1,country1,basePrice1){
        strcpy(grapes,grapes1);
     year=year1;
    }

    float computePrice(){
     if(strcmp(country,"Italy")==0){
        if(year<2005){
            return basePrice+basePrice*0.05+basePrice*0.15;
        }else{
         return basePrice+basePrice*0.05;
        }
     }else{
         if(year<2005){
            return basePrice+basePrice*0.15;
        }else{
         return basePrice;
        }
     }
    }
};

void lowestPrice(AlcoholicDrink **a, int n){
float minPrice=a[0]->computePrice();
int cuvajIndeks;
for(int i=0;i<n;i++){
    if(a[i]->computePrice()<minPrice){
        minPrice=a[i]->computePrice();
        cuvajIndeks=i;
    }

}
 cout<<*(a[cuvajIndeks]);
}


int main() {
    int testCase;
    cin >> testCase;
    float p;
    char name[100];
    char country[100];
    float price;
    bool mainI;
    int year;
    char grape [20];
    if(testCase == 1) {
        cout << "===== TESTING CONSTRUCTORS ======" << endl;
        cin >> p;
        cin >> name;
        cin >> country;
        cin >> price;
        cin >> mainI;
        Beer b(p, name, country, price, mainI);
        cout << b << endl;
        cin >> p;
        cin >> name;
        cin >> country;
        cin >> price;
        cin >> year;
        cin >> grape;
        Wine w(p, name, country, price, year, grape);
        cout << w << endl;

    } else if(testCase == 2) {
        cout << "===== TESTING LOWEST PRICE ======" << endl;
        int n;
        cin >> n;
        AlcoholicDrink** ad = new AlcoholicDrink*[n];
        for(int i = 0; i < n; ++i) {
            cin >> p;
            cin >> name;
            cin >> country;
            cin >> price;

            if(i % 2 == 1){
                cin >> mainI;
                ad[i] = new Beer(p, name, country, price, mainI);
            }
            else {
                cin >> year;
                cin >> grape;
                ad[i] = new Wine(p, name, country, price, year, grape);
            }
        }

        lowestPrice(ad, n);
        for(int i = 0; i < n; ++i) {
            delete ad[i];
        }
        delete [] ad;
    } else if(testCase == 3) {
        cout << "===== TESTING DISCOUNT STATIC ======" << endl;
        int n;
        cin >> n;
        AlcoholicDrink** ad = new AlcoholicDrink*[n];
        for(int i = 0; i < n; ++i) {
            cin >> p;
            cin >> name;
            cin >> country;
            cin >> price;
            if(i % 2 == 1){
                cin >> mainI;
                ad[i] = new Beer(p, name, country, price, mainI);
            }
            else {
                cin >> year;
                cin >> grape;
                ad[i] = new Wine(p, name, country, price, year, grape);
            }
        }
        AlcoholicDrink::total(ad, n);
        int d;
        cin >> d;
        AlcoholicDrink::changeDiscount(d);
        AlcoholicDrink::total(ad, n);
        for(int i = 0; i < n; ++i) {
            delete ad[i];
        }
        delete [] ad;
    }

}