Problem: Write a modular program that simulates a simple student management system. The program should allow users to add students, display student details, and search for students by their names.

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#include <iostream> #include <string> #include <vector> // Structure representing a student struct Student {    std::string name;    int age;    std::string rollNumber; }; // Function to add a new student void addStudent(std::vector<Student>& students) {    Student newStudent;    std::cout << "Enter student name: ";    std::cin.ignore();    std::getline(std::cin, newStudent.name);    std::cout << "Enter student age: ";    std::cin >> newStudent.age;    std::cout << "Enter student roll number: ";    std::cin.ignore();    std::getline(std::cin, newStudent.rollNumber);    students.push_back(newStudent);    std::cout << "Student added successfully.\n"; } // Function to display student details void displayStudents(const std::vector<Student>& students) {    if (students.empty()) {        std::cout << "No students found.\n";        return;    }    std::cout << "Student Details:\n";    for (const auto& student : students) {        std::cout << "Name: " << student.name << std::endl;        std::cout << "Age: " << student.age << std::endl;        std::cout << "Roll Number: " << student.rollNumber << std::endl;        std::cout << "---------------------------\n";    } } // Function to search for students by name void searchStudent(const std::vector<Student>& students, const std::string& searchName) {    bool found = false;    for (const auto& student : students) {        if (student.name == searchName) {            std::cout << "Student found:\n";            std::cout << "Name: " << student.name << std::endl;            std::cout << "Age: " << student.age << std::endl;            std::cout << "Roll Number: " << student.rollNumber << std::endl;            found = true;            break;        }    }    if (!found) {        std::cout << "Student not found.\n";    } } int main() {    std::vector<Student> students;    int choice;    std::string searchName;    while (true) {        std::cout << "\n--- Student Management System ---\n";        std::cout << "1. Add Student\n";        std::cout << "2. Display Students\n";        std::cout << "3. Search Student\n";        std::cout << "4. Exit\n";        std::cout << "Enter your choice: ";        std::cin >> choice;        switch (choice) {            case 1:                addStudent(students);                break;            case 2:                displayStudents(students);                break;            case 3:                std::cout << "Enter student name to search: ";                std::cin.ignore();                std::getline(std::cin, searchName);                searchStudent(students, searchName);                break;            case 4:                std::cout << "Exiting program...\n";                return 0;            default:                std::cout << "Invalid choice. Please try again.\n";        }    }    return 0; }

In this example, we implement a modular program that simulates a student management system. The program defines a Student structure to represent a student with attributes such as name, age, and roll number.

The program includes functions to add a new student, display all student details, and search for students by their names. These functions operate on a vector of Student objects.

In the main function, a menu-driven loop allows users to choose options such as adding a student, displaying all students, searching for a student, or exiting the program.

By running the program, users can interact with the student management system by adding students, displaying their details, and searching for specific students.