A friend and I at IT school tasked ourselves with writing something just for the hell of it. Trying to simulate in a very basic way something that you may want to do in the real world. We thought of the following problem that we could solve ourselves.

X, Y and X INC is in need of a program. They wish to promote the sales of their products in bigger quantity. They wish to give the following discounts to promote better sales.

• If 1 to a 100 of a certain item is sold the company wishes to grant a 10 percent discount.
• If the amount of the product sold is between 101 and 200 the company wishes to grant a 12 percent discount.
• If the amount of the product sold is between 201 and 500 the company wishes to grant a 15 percent discount
• If the amount of product sold is greater than 500 the discount should be 20 percent.

The program should take a price input and a quantity input and should give a total with the applicable discount to the end user without divulging the percentage of the discount.

So this is what we came up with.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DiscountApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Please enter the quanitity of the product bought.");
            var x = Console.ReadLine();
            int x1 = int.Parse(x);

            Console.WriteLine("Please enter the price of the product bought.");
            var y = Console.ReadLine();
            double y1 = double.Parse(y);

            double discount = 0;
            double outValue = 0;

            if (x1 <= 100)
            {
                discount = 0.1;
                outValue = returnTotal(discount, y1, x1);
                Console.WriteLine("The total with the discount is R{0}",outValue);
            }
            else if (x1 > 100 && x1 <= 200)
            {
                discount = 0.12;
                outValue = returnTotal(discount, y1, x1);
                Console.WriteLine("The total with the discount is R{0}",outValue);
            }
            else if (x1 > 200 && x1 <= 500)
            {
                discount = 0.15;
                outValue = returnTotal(discount, y1, x1);
                Console.WriteLine("The total with the discount is R{0}",outValue);
            }
            else
            {   
                discount = 0.2;
                outValue = returnTotal(discount, y1, x1);
                Console.WriteLine("The total with the discount is R{0}",outValue);
            }

            
        }
        public static double returnTotal(double discount, double price, int quantity)
        {
            double Total = (price * quantity);
            double discountTotal = Total - (Total * discount);
            return discountTotal;
        }

    }
   
}