Student Database Management System Gaming Project in C++

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3 months ago

#include <iostream>
#include <unordered_map>
#include <string>

class Student {
public:
    Student(const std::string& name, int age) : name(name), age(age) {}

    void display() const {
        std::cout << "Name: " << name << ", Age: " << age << std::endl;
    }

private:
    std::string name;
    int age;
};

class StudentDatabase {
public:
    void addStudent(const std::string& id, const std::string& name, int age) {
        if (students.find(id) == students.end()) {
            students[id] = Student(name, age);
            std::cout << "Student added: " << name << std::endl;
        } else {
            std::cout << "Student ID already exists!" << std::endl;
        }
    }

    void viewStudent(const std::string& id) const {
        if (students.find(id) != students.end()) {
            students.at(id).display();
        } else {
            std::cout << "Student ID not found!" << std::endl;
        }
    }

    void deleteStudent(const std::string& id) {
        if (students.find(id) != students.end()) {
            students.erase(id);
            std::cout << "Student ID " << id << " deleted." << std::endl;
        } else {
            std::cout << "Student ID not found!" << std::endl;
        }
    }

private:
    std::unordered_map<std::string, Student> students;
};

int main() {
    StudentDatabase db;

    // Adding students
    db.addStudent("1001", "Alice Johnson", 20);
    db.addStudent("1002", "Bob Smith", 22);

    // Viewing student details
    db.viewStudent("1001");
    db.viewStudent("1002");

    // Deleting a student
    db.deleteStudent("1001");

    // Attempting to view deleted student
    db.viewStudent("1001");

    return 0;
}

#include <iostream>

#include <unordered_map>

#include <string>

class Student {

public:

Student(const std::string& name, int age) : name(name), age(age) {}

void display() const {

std::cout << "Name: " << name << ", Age: " << age << std::endl;

}

private:

std::string name;

int age;

};

class StudentDatabase {

public:

void addStudent(const std::string& id, const std::string& name, int age) {

if (students.find(id) == students.end()) {

students[id] = Student(name, age);

std::cout << "Student added: " << name << std::endl;

} else {

std::cout << "Student ID already exists!" << std::endl;

}

void viewStudent(const std::string& id) const {

if (students.find(id) != students.end()) {

students.at(id).display();

} else {

std::cout << "Student ID not found!" << std::endl;

}

void deleteStudent(const std::string& id) {

if (students.find(id) != students.end()) {

students.erase(id);

std::cout << "Student ID " << id << " deleted." << std::endl;

} else {

std::cout << "Student ID not found!" << std::endl;

}

private:

std::unordered_map<std::string, Student> students;

};

int main() {

StudentDatabase db;

// Adding students

db.addStudent("1001", "Alice Johnson", 20);

db.addStudent("1002", "Bob Smith", 22);

// Viewing student details

db.viewStudent("1001");

db.viewStudent("1002");

// Deleting a student

db.deleteStudent("1001");

// Attempting to view deleted student

db.viewStudent("1001");

return 0;

}

Explanation:

Student Class:
- Represents a student with name and age.
- display() const: Displays the student’s details.
StudentDatabase Class:
- Manages student records using an unordered map (std::unordered_map).
- addStudent(const std::string& id, const std::string& name, int age)
  
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  : Adds a new student if the ID does not already exist.
- viewStudent(const std::string& id) const: Displays the details of a student based on their ID.
- deleteStudent(const std::string& id): Deletes a student record by ID if it exists.
main Function:
- Demonstrates adding students, viewing their details, deleting a student, and attempting to view the details of a deleted student.

Compilation:

To compile the program, use:

g++ student_database.cpp -o student_database

1	g++ student_database.cpp -o student_database

Run the program with:

./student_database

1	./student_database

Explanation:

Compilation:

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