Question

#include

#include
#include
using namespace std;
class Person
{
private:
int idNum;
char name[10];
public:
Person(const int id = 000, const char nm[]="");
friend ostream& operator<<(ostream& out, const Person& p);
friend istream& operator>>(istream& in, Person &p);
};
Person::Person(const int id = 000, const char nm[] = "")
{
idNum = id;
strcpy_s(name, nm);
}
ostream& operator<<(ostream& out, const Person& p)
{
out << p.name << p.idNum << endl;
return(out);
}
istream& operator>>(istream& in, Person& p)
{
cout << "Enter ID Number ";
cin >> p.idNum;
cout << "Enter name ";
cin >> p.name;
return(in);
}
int main()
{
Person aPerson;
ofstream out("a:person.dat");
cin >> aPerson;
out.write((char*)(&aPerson), sizeof(aPerson));
return 0;
}

Answer 1

The code represents a C++ program that manages person data using object-oriented programming, operator overloading, and binary file handling.

Step-by-step explanation:

The provided code is an example of a simple C++ program that illustrates object-oriented programming, overloading of the << and >> operators for input and output, and file handling in C++. The class Person has private data members to store an ID number and a name, and it provides a constructor to initialize these members. Furthermore, there are friend functions for handling the input/output operations for objects of the Person class. When the program runs, it prompts the user to enter the details for a person, uses the overloaded >> operator to read the data, and then writes the object to a file named 'person.dat' using the binary write operation. This binary write operation is best suited for efficient memory usage without the need for parsing or formatting the data during file operations.