Next Steps

#ifndef STUDENT_H    // Include guard
#define STUDENT_H

#include <string>
using namespace std;

class Student {
private:
    string name;
    int rollNumber;
    double marks;
    
public:
    Student(string n, int r, double m);
    void display() const;
    int getRoll() const;
    double getMarks() const;
    void setMarks(double m);
    string toFileString() const;
    static Student fromFileString(const string& line);
};

#endif // STUDENT_H

#include "student.h"
#include <iostream>
using namespace std;

Student::Student(string n, int r, double m)
    : name(n), rollNumber(r), marks(m) {}

void Student::display() const {
    cout << "Roll: " << rollNumber 
         << " | Name: " << name 
         << " | Marks: " << marks << endl;
}

int Student::getRoll() const { return rollNumber; }
double Student::getMarks() const { return marks; }
void Student::setMarks(double m) { marks = m; }

string Student::toFileString() const {
    return name + "|" + to_string(rollNumber) + "|" + to_string(marks);
}

Student Student::fromFileString(const string& line) {
    int p1 = line.find("|");
    int p2 = line.find("|", p1 + 1);
    string n = line.substr(0, p1);
    int r = stoi(line.substr(p1 + 1, p2 - p1 - 1));
    double m = stod(line.substr(p2 + 1));
    return Student(n, r, m);
}