cppPyFoodVatTip, C++ (gcc)

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//g++  7.4.0

//cppPyFoodVatTip

//this code is created by Rezaul Hoque on August 22,2022; update: 6:46; 2nd update: 9:24;
//contact: jewelmrh@yahoo.com; Dhaka,   Bangladesh,https://rezaulhoque.wordpress.com;https:hoquestake.blogspot.com
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;

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

class Food{
std::string name;
public:
Food(){}
Food(std::string n){ this->name=n;}
~Food(){}
std::string getN(){return name;}
void nam(){ std::cout<<getN();}
};
class Package: public Food{
int price,qty;
public:
Package (){}
Package (std::string n,int p,int q): Food(n),price(p),qty(q){}
~Package(){}

int getP(){return price;}
int getQ(){return qty;}
float cost(){ return price*qty;}
};

class VatCo{
float vat,total;
int tip;
public:
VatCo(){}
VatCo (float v,int t,float to){vat=v; tip=t; total=to;}
float getV(){return vat;}
int getTip(){return tip;}
float getTo(){return total;}
virtual float convert()=0;
};
class NoVat:public VatCo{
public:
NoVat(){}
NoVat(float v,int t,float to):VatCo(v,t,to){}
~NoVat(){}
float convert(){ return getTip()+getTo();}
};
class WithVat: public VatCo{
public:

WithVat(){}
WithVat(float v,int t,float to):VatCo(v,t,to){}
~WithVat(){}
float convert(){ return getTip()+getTo()+getTo()*getV();}
};
int main()
{
   Package*  p[3];
p[0]=new Package("Dal Roti",25,1);
p[1]=new Package("Parota Korma",120,1);
p[2]=new Package ("Naan Lotpoti",50,1);
float total=0.0;
for(int i=0;i<3;i++){
std::cout<<p[i]->getN()<<" "<<p[i]->getP()<<" "<<p[i]->getQ()<<"\n";
total +=p[i]->cost();
}
std::cout<<"Total cost: "<<total<<" \n";
WithVat gr(0.15,20,195);
std::cout<<"Grand total with vat and tips: "<<gr.convert()<<"\n";
return 0;
}

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Compilation time: 0.41 sec, absolute running time: 0.14 sec, cpu time: 0.01 sec, memory peak: 6 Mb, absolute service time: 0,63 sec