Example: Regional Taxation with If-Else If in C++

// Regional Taxation with If-Else If
#include <iostream>
#include <string>
#include <iomanip> // For std::fixed and std::setprecision

double calculateTaxIfElse(double amount, const std::string& region) {
    double taxRate = 0.0; // Default tax rate

    if (region == "North") {
        taxRate = 0.05; // 5% tax
    } else if (region == "South") {
        taxRate = 0.07; // 7% tax
    } else if (region == "East") {
        taxRate = 0.06; // 6% tax
    } else if (region == "West") {
        taxRate = 0.08; // 8% tax
    } else {
        std::cout << "Warning: Unknown region '" << region << "'. Applying default tax (0%)." << std::endl;
        taxRate = 0.0;
    }

    return amount * taxRate;
}

int main() {
    double itemAmount = 100.0;

    // Step 1: Calculate tax for North region
    std::string region1 = "North";
    double tax1 = calculateTaxIfElse(itemAmount, region1);
    double totalCost1 = itemAmount + tax1;
    std::cout << std::fixed << std::setprecision(2); // Format output to 2 decimal places
    std::cout << "Item: $" << itemAmount << ", Region: " << region1 << ", Tax: $" << tax1 << ", Total: $" << totalCost1 << std::endl;

    // Step 2: Calculate tax for South region
    std::string region2 = "South";
    double tax2 = calculateTaxIfElse(itemAmount, region2);
    double totalCost2 = itemAmount + tax2;
    std::cout << "Item: $" << itemAmount << ", Region: " << region2 << ", Tax: $" << tax2 << ", Total: $" << totalCost2 << std::endl;

    // Step 3: Calculate tax for an unknown region
    std::string region3 = "Central";
    double tax3 = calculateTaxIfElse(itemAmount, region3);
    double totalCost3 = itemAmount + tax3;
    std::cout << "Item: $" << itemAmount << ", Region: " << region3 << ", Tax: $" << tax3 << ", Total: $" << totalCost3 << std::endl;

    return 0;
}