main.cpp

#include <iostream>
#include <vector>
#include <string>

using namespace std;

class Student {
public:
    int id;
    string name;
    float marks;

    Student(int i, string n, float m) {
        id = i;
        name = n;
        marks = m;
    }
};

vector<Student> students;

// ✅ Add student
void addStudent() {
    int id;
    string name;
    float marks;

    cout << "Enter ID: ";
    cin >> id;
    cin.ignore();

    cout << "Enter Name: ";
    getline(cin, name);

    cout << "Enter Marks: ";
    cin >> marks;

    students.push_back(Student(id, name, marks));
    cout << "✅ Student added successfully!\n\n";
}

// ✅ Display students
void displayStudents() {
    if (students.empty()) {
        cout << "No students found.\n\n";
        return;
    }

    cout << "\n📋 Student List:\n";
    for (auto &s : students) {
        cout << "ID: " << s.id
             << " | Name: " << s.name
             << " | Marks: " << s.marks << endl;
    }
    cout << endl;
}

// ✅ Search student
void searchStudent() {
    int id;
    cout << "Enter ID to search: ";
    cin >> id;

    for (auto &s : students) {
        if (s.id == id) {
            cout << "✅ Found: " << s.name << " (" << s.marks << ")\n\n";
            return;
        }
    }

    cout << "❌ Student not found.\n\n";
}

// ✅ Delete student
void deleteStudent() {
    int id;
    cout << "Enter ID to delete: ";
    cin >> id;

    for (auto it = students.begin(); it != students.end(); ++it) {
        if (it->id == id) {
            students.erase(it);
            cout << "✅ Student deleted.\n\n";
            return;
        }
    }

    cout << "❌ Student not found.\n\n";
}

int main() {
    int choice;

    while (true) {
        cout << "====== Student Record Manager ======\n";
        cout << "1. Add Student\n";
        cout << "2. Display Students\n";
        cout << "3. Search Student\n";
        cout << "4. Delete Student\n";
        cout << "5. Exit\n";
        cout << "Enter choice: ";
        cin >> choice;

        switch (choice) {
            case 1: addStudent(); break;
            case 2: displayStudents(); break;
            case 3: searchStudent(); break;
            case 4: deleteStudent(); break;
            case 5: return 0;
            default: cout << "Invalid choice\n\n";
        }
    }
}