Code:
#include <iostream>
using namespace std;
class CD
{
public:
static const int num = 100;
char publisher[num], title[num], location[num];
int year;
public:
void virtual input()=0;
void virtual output()=0;
};
class Classical: public CD
{
protected:
static const int num = 100;
char composer[num], conductor[num];
public:
void virtual input()=0;
void virtual output()=0;
};
class Popular: public CD
{
private:
static const int num=100;
char name_of_the_band[num], composer[num], leading_performer[num];
public:
void input()
{ cout << "\nPublisher : ";
cin >> publisher;
cout << "Title : ";
cin >> title;
cout << "Location : ";
cin >> location;
cout << "Year : ";
cin >> year;
cout << "Name of the band : ";
cin >> name_of_the_band;
cout << "Composer : ";
cin >> composer;
cout << "Leading performer: ";
cin >> leading_performer;
}
void output()
{
cout << "\nPublisher : " << publisher;
cout << "\nTitle : " << title;
cout << "\nLocation : " << location;
cout << "\nYear : " << year;
cout << "\nName of the band : " << name_of_the_band;
cout << "\nComposer : " << composer;
cout << "\nLeading performer : " << leading_performer;
}
};
class Symphony: public Classical
{
private: static const int num=100;
char orchestra[num], location[num];
public: void input(){
cout << "\nPublisher: ";
cin >> publisher;
cout << "Title : ";
cin >> title;
cout << "Location : ";
cin >> location;
cout << "Year : ";
cin >> year;
cout << "Composer : ";
cin >> composer;
cout << "Conductor: ";
cin >> conductor;
cout << "Orchestra: ";
cin >> orchestra;
cout << "Location : ";
cin >> location;}
void output()
{ cout << "\nPublisher :" << publisher;
cout << "\nTitle :" << title;
cout << "\nLocation :" << location;
cout << "\nYear :" << year;
cout << "\nComposer :" << composer;
cout << "\nConductor :" << conductor;
cout << "\nOrchestra :" << orchestra;
cout << "\nLocation :" << location;}};
void ShellSort(CD *arr[],int n); //function prototype for our Shell sort algorithm
void main()
{
CD *cdptr[100]; //pointer declaration for each of our class
Popular *popptr;
Symphony *symptr;
int n=0, choose, symphonyCD, popularCD, pop;
char terminate;
cout << "\t\tEnter 2 or more CD-s to sort!" << endl;
do // do-while statement which allows the user to enter data and terminate the program when he wants
{
cout << "\n1.Classical";
cout << "\n2.Popular";
cout << "\n3.Sort";
cout << "\n4.Display";
cout << "\n5.Terminate program";
cout << endl << endl;
cout << "\nChoose category: ";
cin>>choose;
switch(choose) //switch for the user to choose the type of input
{
case 1:
cout << "\nChoose category: ";
cout << "\n1.Symphony";
cout << endl << endl;
cin >> pop;
if(pop==1) //if-else statement to chose the type of classical CD
{
cout << "\nEnter number of symphony cd: ";
cin >> symphonyCD;
int static b;
for(int i=0; i<symphonyCD;i++)
{
cout << "\nNr. " << ++b << endl;
symptr = new Symphony;
symptr->input();
cdptr[n++]=symptr;
}
}
else
cout << "\nNot recognized value!";
break;
case 2:
cout << "\nEnter number of popular cd: ";
cin >> popularCD;
int static a;
for(int i=0; i<popularCD;i++)
{
cout << "\nNr. " << ++a << endl;
popptr = new Popular;
popptr->input();
cdptr[n++]=popptr;
}
break;
case 3:
ShellSort(cdptr,100); //function call statement for our Shell Sort algorithm
break;
case 4:
if(n==0)
cout << "\nNo data entered!" << endl;
for(int i=0; i<n;i++)
{
cdptr[i]->output();
cout << endl;
}
break;
case 5:
cout << "\nDo you want to terminate the program? (y/n)";
cin >> terminate;
break;
default:
cout << "\nNot recognized value!" << endl;
}
}while(terminate!='y');
system("pause");
}
void ShellSort(CD *arr[],int n)
{
int i,j,increment;
CD *temp;
for(increment=n/2; increment>0; increment /= 2)
{
for(i=increment; i<n; i++)
{
temp=arr[i];
for(j=i; j>=increment; j -= increment)
{
if(temp->title < arr[j-increment]->title)
{
arr[j] = arr[j-increment];
}
else break;}
arr[j] = temp;}}}
