Vending Machine Implement class: Vending Machine according to the followingrequirements:can be instantiated using the constructor Vending Machine(num_items,item_price) where num_items denotes the number of items in themachine, and item_price denotes the required number of coins to buya single item.has a method buy(req_items, money) that represents a buy requestwhere req_items denotes the requested number of items, andmoney is the amount the customer puts into the machine. Dependingon the state of the machine, one of the following happenso If there are enough items in the machine to serve the request andthe given money is sufficient to buy the requested number ofitems, the number of items in the machine is reduced by therequested number of items. The method returns an integerdenotes the change given back after the purchase.• If there are fewer items in the machine than the requestednumber, it raises a ValueError exception with the message "Notenough items in the machine".o If there are enough items in the machine to serve the request butthe given amount of money is less than their cost, it raisesa ValueError exception with the message "Not enough coins".The class implementation will be tested by a provided code stub andseveral input files. Each input file contains parameters to test theimplementation. First, the provided code stub initializes an instanceof the Vending Machine. Next, it performs the given operations onthe Vending Machine instance. The result of their execution will beprinted to the standard output by the provided code.ConstraintsThere will be at most 100 operations to be performed

Implement class: Vending Machine according to the following requirements: can be instantiated using the constructor Vending Machine(num_items item_price) where num_items denotes the number of items in the machine, and item_price denotes the required number of coins to buy a single item. • has a method buy(req_items, money) that represents a buy request where req_items denotes the requested number of items, and money is the amount the customer puts into the machine. Depending on the state of the machine, one of the following happens

Implement class: Vending Machine according to the following requirements: can be instantiated using the constructor Vending Machine(num_items item_price) where num_items denotes the number of items in the machine, and item_price denotes the required number of coins to buy a single item. • has a method buy(req_items, money) that represents a buy request where req_items denotes the requested number of items, and money is the amount the customer puts into the machine. Depending on the state of the machine, one of the following happens

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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