include iostream using namespace std union cost int decim double float

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#include <iostream>
using namespace std;
union cost {
int decim;
double floating;
void init() {
cin >> floating;
if ((int) floating == floating) {
decim = (int) floating;
}
}
double get() {
if (floating != NULL) return floating;
return decim;
}
};
struct books {
string name;
string author;
int year;
int pages;
cost price;
};
int main() {
struct books book;
cout << "Enter name of the book:";
cin >> book.name;
cout << "Enter author of the book:";
cin >> book.author;
cout << "Enter year of the book:";
cin >> book.year;
printf("Enter number of pages in the book:");
cin >> book.pages;
printf("Enter price of the book:");
book.price.init();
cout << "Book name: " << book.name << endl;
cout << "Book author: " << book.author << endl;
cout << "Book year: " << book.year << endl;
cout << "Book number of pages: " << book.pages << endl;
cout << "Book price: " << book.price.get() << endl;
return 0;
}