Question

public: bool older(wine &); returns false otherwise int ageDifference(wine &); Postcondition: returns the difference in years produced (must be a positive value) between the calling object and the one explicitly passed to the function bool costlier(wine &); // Postcondition: returns true if the calling objectis"costlier than the object explicitly passed to the function returns false otherwise void inputValuesForwineobj); / Prompts the user to enter type, year, and cost of the calling wine object (a bottle) // Postcondition: data members of the calling object are properly loaded with values entered by the user void displaywineobj): / Postcondition: displays the contents of the calling object in a format shown is the sample output private: string type; IIred or white int year double cost; / per bottle retail // year produced xx Get info for bottle-1 Enter wine type, year produced, and coot: Red 2012 79.99 Enter wine type, year produced, and cost: White 2018 25.5 Bottle #1 Type: Red Year: 2012 cost: $79.99 Bottle #2: Type: White Year: 2018 cost: $25.50 Bottle #1 is older ! The age difference between bottle #1 and bottle-2-6 Bottle #1 is more expensive, Press any key to continue..I IIT Given the wine class interface below, a) Implement all five member functions. b) write a main() function that tests all member function directly or indirectly. Your program output should be similar to the sample output shown below. class wine 2. 5*6-30% 15%

Answer 1

#include<iostream>
#include<cstring>
#include<iomanip>
#include<cmath>
using namespace std;
class wine
{
public:
bool older(wine &);
int ageDifference(wine &);
bool costlier(wine &);
void inputValuesForWineObj();
void displayWineObj();
private:
string type;
int year;
double cost;
};
void wine::inputValuesForWineObj()
{
cout<<"Enter wine type, year produced, and cost: ";
cin>>type>>year>>cost;
}
void wine::displayWineObj()
{
cout<<"\tType: "<<type<<endl;
cout<<"\tYear: "<<year<<endl;
cout<<"\tCost: $"<<setiosflags(ios::fixed)<<setprecision(2)<<cost<<endl;
}
bool wine::older(wine &obj)
{
if(year<obj.year)
return true;
return false;
}
int wine::ageDifference(wine &obj)
{
return abs(year-obj.year);
}
bool wine::costlier(wine &obj)
{
if(cost>obj.cost)
return true;
return false;
}
int main()
{
wine obj1,obj2; //declare wine objects
cout<<"*** Get info for bottle-1 ***"<<endl;
obj1.inputValuesForWineObj();
cout<<"\n*** Get info for bottle-2 ***"<<endl;
obj2.inputValuesForWineObj();
cout<<"\nBottle #1:"<<endl;
obj1.displayWineObj();
cout<<"\nBottle #2:"<<endl;
obj2.displayWineObj();
if(obj1.older(obj2)==true)
cout<<"\nBottle #1 is older!"<<endl;
else
cout<<"\nBottle #2 is older!"<<endl;
cout<<"\nThe age difference between bottle #1 and bottle #2 = "<<obj1.ageDifference(obj2)<<endl;
if(obj1.costlier(obj2)==true)
cout<<"\nBottle #1 is more expensive!"<<endl;
else
cout<<"\nBottle #2 is more expensive!"<<endl;
return 0;
}
Output

koushikhp@koushikhpnew: hp 59书令4)) 9:27 PM Ikoushikho koushikhp@koushikhpnew: g++ winedetails.cpp koushikhp@koushikhpnew:-$ /a.out ***Get info for bottle-1** Enter wine type, year produced, and cost: Red 2012 79.99 ***Get info for bottle-2 Enter wine type, year produced, and cost: White 2018 25.5 Bottle #1: Type: Red Year: 2012 Cost: $79.99 Bottle #2: Type: White Year: 2018 Cost: $25.50 Bottle #1 ts older! The age difference between bottle #1 and bottle #2-6 Bottle #1 is more expensive! koushikhp@koushikhpnew: $ 48