Example: Regional Taxation with If-Else If in C

// Regional Taxation with If-Else If
#include <stdio.h>
#include <string.h> // Required for strcmp()

// Function to get tax rate based on region name
float getTaxRate(const char* region) {
    // Step 1: Compare input region with known regions using strcmp()
    // strcmp returns 0 if strings are equal
    if (strcmp(region, "North") == 0) {
        return 0.10; // 10% tax rate
    } else if (strcmp(region, "South") == 0) {
        return 0.075; // 7.5% tax rate
    } else if (strcmp(region, "East") == 0) {
        return 0.12; // 12% tax rate
    } else if (strcmp(region, "West") == 0) {
        return 0.08; // 8% tax rate
    } else {
        return 0.05; // Default tax rate for unknown regions (e.g., 5%)
    }
}

int main() {
    char regionName[50];
    float itemPrice;
    float taxRate;
    float finalPrice;

    // Step 2: Prompt user for region and item price
    printf("Enter the region (North, South, East, West): ");
    scanf("%s", regionName);

    printf("Enter the item price: $");
    scanf("%f", &itemPrice);

    // Step 3: Get the tax rate for the specified region
    taxRate = getTaxRate(regionName);

    // Step 4: Calculate final price
    finalPrice = itemPrice * (1 + taxRate);

    // Step 5: Display results
    printf("\nRegion: %s\n", regionName);
    printf("Item Price: $%.2f\n", itemPrice);
    printf("Tax Rate: %.2f%%\n", taxRate * 100);
    printf("Final Price (including tax): $%.2f\n", finalPrice);

    return 0;
}