Write a program to create a file named "cdplayer.dat" and store cd_id, Nameofcd and price of N no. of cd player to the file and read the information from the file and display them.

 Sure, here's an example program that demonstrates how to create a file named "cdplayer.dat", store CD player information to the file, and then read and display the information from the file:

#include <iostream>
#include <fstream>
using namespace std;
// Define a structure to hold CD player information
struct CDPlayer {
    int cd_id;
    string name;
    float price;
};
// Function to write CD player information to the file
void writeToFile(CDPlayer player[], int n) {
    ofstream outfile("cdplayer.dat", ios::binary);
    if (!outfile) {
        cout << "Error: Failed to create file!" << endl;
        return;
    }
    // Write CD player information to the file
    outfile.write((char*)player, n * sizeof(CDPlayer));
    outfile.close();
}
// Function to read CD player information from the file and display it
void readFromFile() {
    ifstream infile("cdplayer.dat", ios::binary);
    if (!infile) {
        cout << "Error: Failed to open file!" << endl;
        return;
    }
    CDPlayer player;
    while (infile.read((char*)&player, sizeof(CDPlayer))) {
        // Display CD player information
        cout << "CD ID: " << player.cd_id << endl;
        cout << "Name of CD: " << player.name << endl;
        cout << "Price: " << player.price << endl;
        cout << "------------------------" << endl;
    }
    infile.close();
}
int main() {
    int n;
    cout << "Enter the number of CD players: ";
    cin >> n;
    CDPlayer player[n];
    for (int i = 0; i < n; i++) {
        cout << "Enter CD ID: ";
        cin >> player[i].cd_id;
        cout << "Enter Name of CD: ";
        cin >> player[i].name;
        cout << "Enter Price: ";
        cin >> player[i].price;
    }
    writeToFile(player, n);
    cout << "CD player information stored in file." << endl;
    cout << "------------------------------------" << endl;
    cout << "CD player information read from file." << endl;
    cout << "------------------------------------" << endl;
    readFromFile();
    return 0;
}

In this program, we define a structure CDPlayer to hold information about a CD player, including a CD ID, the name of the CD, and the price of the CD player. We then define a function writeToFile that takes an array of CDPlayer objects and writes them to the file "cdplayer.dat" using binary mode. The function readFromFile reads the information from the file and displays it on the screen.

In the main function, we prompt the user to enter the number of CD players they want to store information about, and then we create an array of CDPlayer objects to hold the information. We then prompt the user to enter the CD ID, name of CD, and price for each CD player and store the information in the array.

After we have collected all of the CD player information, we call the writeToFile function to write the information to the file. We then call the readFromFile function to read the information from the file and display it on the screen.

Note that we use the ofstream and ifstream classes to perform file input/output operations. The ios::binary flag is used to specify binary mode for the file. This is necessary to ensure that the data is written to the file in binary format, rather than as text.