Simulation of Database Management System Gaming Project in C++

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#include <iostream>
#include <vector>
#include <string>

class Record {
public:
    int id;
    std::string name;
    int age;

    Record(int i, const std::string &n, int a) : id(i), name(n), age(a) {}
};

class Database {
private:
    std::vector<Record> records;

public:
    void addRecord(int id, const std::string &name, int age) {
        records.emplace_back(id, name, age);
        std::cout << "Record added successfully!\n";
    }

    void displayRecords() const {
        if (records.empty()) {
            std::cout << "No records to display.\n";
            return;
        }
        std::cout << "ID\tName\t\tAge\n";
        std::cout << "--------------------------------\n";
        for (const auto &record : records) {
            std::cout << record.id << "\t" << record.name << "\t\t" << record.age << "\n";
        }
    }

    void searchRecord(int id) const {
        for (const auto &record : records) {
            if (record.id == id) {
                std::cout << "Record Found:\n";
                std::cout << "ID: " << record.id << ", Name: " << record.name << ", Age: " << record.age << "\n";
                return;
            }
        }
        std::cout << "Record not found.\n";
    }

    void deleteRecord(int id) {
        for (auto it = records.begin(); it != records.end(); ++it) {
            if (it->id == id) {
                records.erase(it);
                std::cout << "Record deleted successfully!\n";
                return;
            }
        }
        std::cout << "Record not found.\n";
    }
};

int main() {
    Database db;
    int choice, id, age;
    std::string name;

    do {
        std::cout << "\n--- Database Management System ---\n";
        std::cout << "1. Add Record\n";
        std::cout << "2. Display Records\n";
        std::cout << "3. Search Record\n";
        std::cout << "4. Delete Record\n";
        std::cout << "5. Exit\n";
        std::cout << "Enter your choice: ";
        std::cin >> choice;

        switch (choice) {
            case 1:
                std::cout << "Enter ID: ";
                std::cin >> id;
                std::cin.ignore(); // to ignore newline after ID input
                std::cout << "Enter Name: ";
                std::getline(std::cin, name);
                std::cout << "Enter Age: ";
                std::cin >> age;
                db.addRecord(id, name, age);
                break;
            case 2:
                db.displayRecords();
                break;
            case 3:
                std::cout << "Enter ID to search: ";
                std::cin >> id;
                db.searchRecord(id);
                break;
            case 4:
                std::cout << "Enter ID to delete: ";
                std::cin >> id;
                db.deleteRecord(id);
                break;
            case 5:
                std::cout << "Exiting...\n";
                break;
            default:
                std::cout << "Invalid choice! Please try again.\n";
        }
    } while (choice != 5);

    return 0;
}

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#include <iostream>

#include <vector>

#include <string>

class Record {

public:

int id;

std::string name;

int age;

Record(int i, const std::string &n, int a) : id(i), name(n), age(a) {}

};

class Database {

private:

std::vector<Record> records;

public:

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

records.emplace_back(id, name, age);

std::cout << "Record added successfully!\n";

}

void displayRecords() const {

if (records.empty()) {

std::cout << "No records to display.\n";

return;

}

std::cout << "ID\tName\t\tAge\n";

std::cout << "--------------------------------\n";

for (const auto &record : records) {

std::cout << record.id << "\t" << record.name << "\t\t" << record.age << "\n";

}

void searchRecord(int id) const {

for (const auto &record : records) {

if (record.id == id) {

std::cout << "Record Found:\n";

std::cout << "ID: " << record.id << ", Name: " << record.name << ", Age: " << record.age << "\n";

return;

}

std::cout << "Record not found.\n";

}

void deleteRecord(int id) {

for (auto it = records.begin(); it != records.end(); ++it) {

if (it->id == id) {

records.erase(it);

std::cout << "Record deleted successfully!\n";

return;

}

std::cout << "Record not found.\n";

}

};

int main() {

Database db;

int choice, id, age;

std::string name;

do {

std::cout << "\n--- Database Management System ---\n";

std::cout << "1. Add Record\n";

std::cout << "2. Display Records\n";

std::cout << "3. Search Record\n";

std::cout << "4. Delete Record\n";

std::cout << "5. Exit\n";

std::cout << "Enter your choice: ";

std::cin >> choice;

switch (choice) {

case 1:

std::cout << "Enter ID: ";

std::cin >> id;

std::cin.ignore(); // to ignore newline after ID input

std::cout << "Enter Name: ";

std::getline(std::cin, name);

std::cout << "Enter Age: ";

std::cin >> age;

db.addRecord(id, name, age);

break;

case 2:

db.displayRecords();

break;

case 3:

std::cout << "Enter ID to search: ";

std::cin >> id;

db.searchRecord(id);

break;

case 4:

std::cout << "Enter ID to delete: ";

std::cin >> id;

db.deleteRecord(id);

break;

case 5:

std::cout << "Exiting...\n";

break;

default:

std::cout << "Invalid choice! Please try again.\n";

}

} while (choice != 5);

return 0;

}

Explanation

Record Class:
- The Record class represents a single record in the database. It contains three data members: id
  
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  , name, and age.
Database Class:
- The Database class contains a std::vector of Record objects, representing the collection of records in the database.
- The class has the following member functions:
  - addRecord(int id, const std::string &name, int age): Adds a new record to the database.
  - displayRecords() const: Displays all records in the database.
  - searchRecord(int id) const: Searches for a record by its ID and displays it.
  - deleteRecord(int id): Deletes a record from the database by its ID.
Main Function:
- The main function provides a menu-driven interface for the user to interact with the database.
- The user can add, display, search, and delete records through the menu options.
- The program continues to run until the user chooses to exit.

Explanation

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