#include <stdio.h>

// YOU CAN CHANGE EACH THESE VALUES AS YOU LIKE.
#define PKG_MAX_WEIGHT 85.00 // DEFINING MAXIMUM ALLOWED WEIGHT OF A PACKAGE.
#define PKG_MAX_VOLUME 15.00 // DEFINING MAXIMUM ALLOWED VOLUME OF A PACKAGE.

#define COST_PER_VOLUME 2.75 // DEFINING COST PER VOLUME OF A PACKAGE.
#define COST_PER_WEIGHT 6.95 // DEFINING COST PER WEIGHT OF A PACKAGE.

typedef struct // DEFINING A STRUCT FOR PACKAGE DATATYPE
{
    double width;
    double height;
    double length;
    double weight;
    double volume;
    double shipping_cost;
} Package;

// FUNCTION PROTOTYPES
double calculate_volume(double length, double width, double height);
double calculate_shipping_cost(double volume, double weight);

int main()
{
    Package package = {};

    // Prompt user for weight of package in feet
    puts("Please enter weight of package in pounds.");
    scanf("%lf", &package.weight);

    // Display Error Message for overweight packages
    if (package.weight > PKG_MAX_WEIGHT)
    {
        printf("This package is above 85 lbs and cannot ship,\nPlease enter weight of package in pounds.");
        return 1;
    }
    else
    {
        // Prompt user for length of package in feet
        puts("Please enter length of package in feet.");
        scanf("%lf", &package.length);

        // Prompt user for width of package in feet
        puts("Please enter width of package in feet.");
        scanf("%lf", &package.width);

        // Prompt user for height of package in feet
        puts("Please enter height of package in feet.");
        scanf("%lf", &package.height);

        // Calculations for Volume
        package.volume = calculate_volume(package.length, package.width, package.height);

        if (package.volume > PKG_MAX_VOLUME)
        {
            puts("This package is above 15 cubic feet and cannot ship!");
            return 1;
        }
        else
        {
            // Calculations for ShippingCost
            package.shipping_cost = calculate_shipping_cost(package.volume, package.weight);

            puts("====================================");
            // Display a shippingReport consisting of the width, length, height in feet, the weight of the box, volume of the box, and the cost of shipping.
            printf(" Your package shipping details:\n\n");

            printf(" Weight\t:\t%.2lf\n\n", package.weight);
            printf(" Length\t:\t%.2lf\n\n", package.length);
            printf(" Width\t:\t%.2lf\n\n", package.width);
            printf(" Height\t:\t%.2lf\n\n", package.height);
            printf(" Volume\t:\t%.2lf\n\n", package.volume);

            printf(" Your total shipping cost is: %.2lf\n", package.shipping_cost);
            puts("=====================================");
        }
    }
    return 0;
}

// FUNCTION IMPLIMENTATIONS

/* function for calculate the volume of the package. */
double calculate_volume(double length, double width, double height)
{
    return length * width * height;
}

/* function for calculate the shipping cost of the package. */
double calculate_shipping_cost(double volume, double weight)
{
    return (volume * COST_PER_VOLUME) * (weight * COST_PER_WEIGHT);
}