Question

Debug please. It's in C++

#include<iostream>

#include<string>

using namespace std;

class Prescription

{

   friend ostream& operator<<(ostream&, const Prescription&);

   friend istream& operator>>(istream&, Prescription&);

   private:

int idNum;

int numPills;

double price;

   public:

Prescription(const int = 0, const int = 0, const double = 0.0);

};

Prescription::Prescription(const int id, const int pills, const double p)

{

   id = id;

   numPills = pills;

   price = p;

}

ostream& operator<<(ostream& out, const Prescription pre)

{

   out << "Prescription #" << pre.idNum <<

" Pills: " << pre.numPills <<

" Price is $" << per.price << endl;

   return out;

}

istream& operator>>(istream& in, Prescridtion& pre)

{

   cout << endl;

   cout << "Enter prescription number ";

   in >> preidNum;

   if(pre.idNum <= 0);

   throw("Invalid ID");

   cout << "Enter number of pills ";

   in >> pre.numPills;

   if(pre.numPills <= 0)

   throws("Number of pills invalid");

   cout << "Enter price ";

   in >> pre.price;

   if(pre.price < 0.0)

   throw("Price is negative");

   return in;

}

int main()

{

   Prescription aScrip;

   try

cin >> aScrip;

   catch(const char *msg)

   {

cout << msg << endl;

   }

   cout << aScrip;

   return 0;

}

Answer 1

#include<iostream>
#include<string>

using namespace std;

class Prescription {
    friend ostream &operator<<(ostream &, const Prescription &);
    friend istream &operator>>(istream &, Prescription &);
private:
    int idNum;
    int numPills;
    double price;
public:
    Prescription(const int = 0, const int = 0, const double = 0.0);
};

Prescription::Prescription(const int id, const int pills, const double p) {
    this->idNum = id;
    numPills = pills;
    price = p;
}

ostream &operator<<(ostream &out, const Prescription &pre) {
    out << "Prescription #" << pre.idNum << " Pills: " << pre.numPills << " Price is $" << pre.price << endl;
    return out;
}

istream &operator>>(istream &in, Prescription &pre) {
    cout << endl;
    cout << "Enter prescription number ";
    in >> pre.idNum;
    if (pre.idNum <= 0)
        throw "Invalid ID";
    cout << "Enter number of pills ";
    in >> pre.numPills;
    if (pre.numPills <= 0)
        throw "Number of pills invalid";
    cout << "Enter price ";
    in >> pre.price;
    if (pre.price < 0.0)
        throw "Price is negative";
    return in;
}

int main() {
    Prescription aScrip;
    try {
        cin >> aScrip;
    }
    catch (const char *msg) {
        cout << msg << endl;
    }
    cout << aScrip;
    return 0;
}