Project: A Console Grade Book

This project combines everything in the course into a small program you could extend for a real school.

Design

Create a Student class with a name and a vector of scores. A GradeBook class holds students and provides add, report and class average functions.

Build the Model

Keep printing out of the model where possible. Methods should calculate and return values so they are easy to test.

#include <numeric>
#include <string>
#include <vector>

class Student {
private:
    std::string name;
    std::vector<int> scores;

public:
    explicit Student(std::string name) : name(std::move(name)) {}

    void addScore(int score) {
        if (score < 0 || score > 100) {
            throw std::invalid_argument("Score must be 0 to 100");
        }
        scores.push_back(score);
    }

    double average() const {
        if (scores.empty()) return 0;
        int total = std::accumulate(scores.begin(), scores.end(), 0);
        return static_cast<double>(total) / scores.size();
    }

    const std::string& getName() const { return name; }
};

Report

Sort students by average, then print aligned columns and a class average. Handle a student with no scores without dividing by zero.

Practice

1. Add a highestScore method to Student.
2. Add a subject field.
3. Print a pass or fail status for each student.

Hands-on exercise

Build the grade book.
1. Add at least four students with two or three scores.
2. Reject scores outside 0 to 100.
3. Print a report sorted by average, highest first.
4. Print the class average at the end.

Recap

A finished console program separates the model from output, uses standard containers and algorithms, and handles edge cases.