Untitled

#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;


struct StudentRecord {
    char name[20];
    int rollNo;
    float marks;
};


void insertRecord()
{
    StudentRecord newRecord;
    ofstream outfile("student_records.txt", ios::app | ios::binary);
    cout << "Enter student name: ";
    cin >> newRecord.name;
    cout << "Enter student roll number: ";
    cin >> newRecord.rollNo;
    cout << "Enter student marks: ";
    cin >> newRecord.marks;
    outfile.write((char*)&newRecord, sizeof(newRecord));
    outfile.close();
}


void displayRecords() {
    StudentRecord currentRecord;
    ifstream infile("student_records.txt", ios::binary);
    while (infile.read((char*)&currentRecord, sizeof(currentRecord))) {
        cout << "Name: " << currentRecord.name << endl;
        cout << "Roll No: " << currentRecord.rollNo << endl;
        cout << "Marks: " << currentRecord.marks << endl << endl;
    }
    infile.close();
}


void searchRecord() {
    int rollNo;
    StudentRecord currentRecord;
    ifstream infile("student_records.txt", ios::binary);
    cout << "Enter roll number to search: ";
    cin >> rollNo;
    while (infile.read((char*)&currentRecord, sizeof(currentRecord))) {
        if (currentRecord.rollNo == rollNo) {
            cout << "Name: " << currentRecord.name << endl;
            cout << "Roll No: " << currentRecord.rollNo << endl;
            cout << "Marks: " << currentRecord.marks << endl << endl;
            break;
        }
    }
    infile.close();
}


int main() {

    int choice;
    

    do {
        
      
        cin >> choice;
        switch (choice) {
            case 1:
                insertRecord();
                break;
            case 2:
                displayRecords();
                break;
            case 3:
                searchRecord();
                break;
            case 4:
                cout << "Exiting program...\n";
                break;
            default:
                cout << "Invalid choice! Please try again.\n";
                break;
        }
    } while (choice != 4);
    return 0;
}