Lab Assignment 11
Code:
#include <iostream> getline(cin, student.name);
#include <fstream>
#include <string> cout << "Enter Division: ";
using namespace std; getline(cin, student.division);
// Student structure cout << "Enter Address: ";
struct Student { getline(cin, student.address);
int rollNumber;
string name; // Write the student information to the file
string division;
file.write(reinterpret_cast<char*>(&student),
string address; sizeof(student));
};
cout << "Student added successfully!" <<
// Function to add a student record endl;
void addStudent(const string &filename) {
ofstream file; file.close();
file.open(filename, ios::app); // Open file in }
append mode
// Function to delete a student record
if (!file) { void deleteStudent(const string &filename) {
cerr << "Error opening file!" << endl; ifstream file(filename, ios::binary);
return; ofstream tempFile("temp.dat", ios::binary);
}
if (!file || !tempFile) {
Student student; cerr << "Error opening file!" << endl;
cout << "Enter Roll Number: "; return;
cin >> student.rollNumber; }
cin.ignore(); // Ignore newline character left
by cin
int rollNumber;
cout << "Enter Roll Number of student to
cout << "Enter Name: "; delete: ";
cin >> rollNumber; ifstream file(filename, ios::binary);
bool studentFound = false; if (!file) {
Student student; cerr << "Error opening file!" << endl;
return;
while }
(file.read(reinterpret_cast<char*>(&student),
sizeof(student))) {
if (student.rollNumber != rollNumber) { int rollNumber;
cout << "Enter Roll Number of student to
tempFile.write(reinterpret_cast<char*>(&stud display: ";
ent), sizeof(student)); cin >> rollNumber;
} else {
studentFound = true; bool studentFound = false;
} Student student;
}
while
if (studentFound) { (file.read(reinterpret_cast<char*>(&student),
sizeof(student))) {
cout << "Student record deleted
successfully!" << endl; if (student.rollNumber == rollNumber) {
} else { cout << "Student Found!" << endl;
cout << "Student with Roll Number " << cout << "Roll Number: " <<
rollNumber << " not found!" << endl; student.rollNumber << endl;
} cout << "Name: " << student.name <<
endl;
cout << "Division: " <<
file.close(); student.division << endl;
tempFile.close(); cout << "Address: " << student.address
<< endl;
studentFound = true;
// Remove original file and rename the temp
file break;
remove(filename.c_str()); }
rename("temp.dat", filename.c_str()); }
}
if (!studentFound) {
// Function to display a student record cout << "Student with Roll Number " <<
rollNumber << " not found!" << endl;
void displayStudent(const string &filename) {
}
addStudent(filename);
file.close(); break;
} case 2:
deleteStudent(filename);
int main() { break;
string filename = "students.dat"; // File to case 3:
store student records
displayStudent(filename);
int choice;
break;
case 4:
do {
cout << "Exiting program..." <<
cout << "\n--- Student Information endl;
System ---\n";
break;
cout << "1. Add Student\n";
default:
cout << "2. Delete Student\n";
cout << "Invalid choice! Please try
cout << "3. Display Student\n"; again." << endl;
cout << "4. Exit\n"; }
cout << "Enter your choice: "; } while (choice != 4);
cin >> choice;
return 0;
switch (choice) { }
case 1:
Output:
--- Student Information System ---
1. Add Student
2. Delete Student
3. Display Student
4. Exit
Enter your choice: 1
