Example: Modular Student Structure Processing in C++

// Modular Student Structure Processing
#include <iostream> // For input/output operations
#include <string>   // For using std::string
#include <vector>   // For using std::vector (dynamic array)
#include <numeric>  // For std::accumulate (summing up scores)

// Define the Student structure
struct Student {
    int id;
    std::string name;
    double score;
};

// Function to add a new student
void addStudent(std::vector<Student>& students, int id, const std::string& name, double score) {
    Student newStudent = {id, name, score};
    students.push_back(newStudent);
    std::cout << "Added student: " << name << std::endl;
}

// Function to display all student records
void displayStudents(const std::vector<Student>& students) {
    if (students.empty()) {
        std::cout << "No student records to display." << std::endl;
        return;
    }
    std::cout << "\n--- Student Records ---" << std::endl;
    for (const Student& s : students) {
        std::cout << "ID: " << s.id
                  << ", Name: " << s.name
                  << ", Score: " << s.score
                  << std::endl;
    }
    std::cout << "-----------------------" << std::endl;
}

// Function to calculate the average score of all students
double calculateAverageScore(const std::vector<Student>& students) {
    if (students.empty()) {
        return 0.0;
    }
    double totalScore = 0.0;
    for (const Student& s : students) {
        totalScore += s.score;
    }
    return totalScore / students.size();
}

int main() {
    std::vector<Student> students;

    // Add students using the addStudent function
    addStudent(students, 101, "Alice", 85.5);
    addStudent(students, 102, "Bob", 78.0);
    addStudent(students, 103, "Charlie", 92.3);

    // Display all students using the displayStudents function
    displayStudents(students);

    // Calculate and display the average score
    double average = calculateAverageScore(students);
    std::cout << "\nAverage Score: " << average << std::endl;

    // Example: Add another student and redisplay
    addStudent(students, 104, "Diana", 89.0);
    displayStudents(students);
    average = calculateAverageScore(students);
    std::cout << "\nNew Average Score: " << average << std::endl;

    return 0;
}