Example: Regional Taxation with Std::Map in C++

// Regional Taxation with Std::Map
#include <iostream>
#include <string>
#include <map>
#include <iomanip> // For std::fixed and std::setprecision

// Define a map to store region tax rates
std::map<std::string, double> regionalTaxRates;

void initializeTaxRates() {
    regionalTaxRates["North"] = 0.05; // 5%
    regionalTaxRates["South"] = 0.07; // 7%
    regionalTaxRates["East"] = 0.06;  // 6%
    regionalTaxRates["West"] = 0.08;  // 8%
    regionalTaxRates["Central"] = 0.04; // 4%
}

double calculateTaxMap(double amount, const std::string& region) {
    double taxRate = 0.0;

    // Check if the region exists in the map
    if (regionalTaxRates.count(region)) {
        taxRate = regionalTaxRates[region];
    } else {
        std::cout << "Warning: Region '" << region << "' not found in tax policy. Applying default tax (0%)." << std::endl;
        taxRate = 0.0;
    }

    return amount * taxRate;
}

int main() {
    // Step 1: Initialize the tax rates map
    initializeTaxRates();

    double itemAmount = 250.0;

    // Step 2: Calculate tax for East region
    std::string region1 = "East";
    double tax1 = calculateTaxMap(itemAmount, region1);
    double totalCost1 = itemAmount + tax1;
    std::cout << std::fixed << std::setprecision(2);
    std::cout << "Item: $" << itemAmount << ", Region: " << region1 << ", Tax: $" << tax1 << ", Total: $" << totalCost1 << std::endl;

    // Step 3: Calculate tax for Central region
    std::string region2 = "Central";
    double tax2 = calculateTaxMap(itemAmount, region2);
    double totalCost2 = itemAmount + tax2;
    std::cout << "Item: $" << itemAmount << ", Region: " << region2 << ", Tax: $" << tax2 << ", Total: $" << totalCost2 << std::endl;

    // Step 4: Calculate tax for an unknown region
    std::string region3 = "UnknownLand";
    double tax3 = calculateTaxMap(itemAmount, region3);
    double totalCost3 = itemAmount + tax3;
    std::cout << "Item: $" << itemAmount << ", Region: " << region3 << ", Tax: $" << tax3 << ", Total: $" << totalCost3 << std::endl;

    return 0;
}