Simulation of Data Warehousing Gaming Project in C++

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

class DataWarehouse {
public:
    // Adds data to the warehouse
    void addData(const std::string& key, const std::string& value) {
        data[key] = value;
    }

    // Retrieves data from the warehouse
    std::string getData(const std::string& key) const {
        auto it = data.find(key);
        if (it != data.end()) {
            return it->second;
        } else {
            return "Data not found";
        }
    }

    // Displays all data in the warehouse
    void displayAllData() const {
        for (const auto& entry : data) {
            std::cout << "Key: " << entry.first << ", Value: " << entry.second << std::endl;
        }
    }

private:
    std::unordered_map<std::string, std::string> data;
};

int main() {
    DataWarehouse warehouse;

    // Add some data to the warehouse
    warehouse.addData("User1", "Alice");
    warehouse.addData("User2", "Bob");
    warehouse.addData("User3", "Charlie");

    // Retrieve and display specific data
    std::cout << "Retrieving User2: " << warehouse.getData("User2") << std::endl;

    // Display all data
    std::cout << "Displaying all data:" << std::endl;
    warehouse.displayAllData();

    return 0;
}

#include <iostream>

#include <vector>

#include <unordered_map>

#include <string>

class DataWarehouse {

public:

// Adds data to the warehouse

void addData(const std::string& key, const std::string& value) {

data[key] = value;

}

// Retrieves data from the warehouse

std::string getData(const std::string& key) const {

auto it = data.find(key);

if (it != data.end()) {

return it->second;

} else {

return "Data not found";

}

// Displays all data in the warehouse

void displayAllData() const {

for (const auto& entry : data) {

std::cout << "Key: " << entry.first << ", Value: " << entry.second << std::endl;

}

private:

std::unordered_map<std::string, std::string> data;

};

int main() {

DataWarehouse warehouse;

// Add some data to the warehouse

warehouse.addData("User1", "Alice");

warehouse.addData("User2", "Bob");

warehouse.addData("User3", "Charlie");

// Retrieve and display specific data

std::cout << "Retrieving User2: " << warehouse.getData("User2") << std::endl;

// Display all data

std::cout << "Displaying all data:" << std::endl;

warehouse.displayAllData();

return 0;

}

Explanation

Header Files:
- <iostream>: For input and output operations.
- <vector>: Although not used in this example, it’s included for potential extensions.
- <unordered_map>: To store key-value pairs efficiently.
- <string>: For handling string operations.
DataWarehouse Class:
- addData(): Adds a key-value pair to the data warehouse. The key is a unique identifier, and the value is the data associated with that key.
- getData(): Retrieves the value associated with a given key. If the key is not found, it returns “Data not found”.
- displayAllData(): Displays all key-value pairs stored in the data warehouse.
main() Function:
- Creates an instance of DataWarehouse
  
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- Adds some key-value pairs to the data warehouse.
- Retrieves and displays a specific data entry using the getData() method.
- Displays all data entries using the displayAllData() method.

Explanation

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