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Chapter 7: Problem 42

Write a remove member function that accepts an argument for a number of units and removes that number of units of an item from inventory, If the operation is completed successfully it should return the number of units remaining in stock for that item. However, if the number of units passed to the function is less than the number of units in stock, it should not make the removal and should return- 1 as an error signal.

Short Answer

Expert verified
Answer: -1

Step by step solution

01

Define the Inventory class

First, we'll define a class called "Inventory" to store the number of units in stock. This class should have a private member variable named "unitsInStock". We will also create a constructor to initialize the inventory. ```cpp class Inventory { private: int unitsInStock; public: Inventory(int initialUnits) : unitsInStock(initialUnits) {} }; ``` Now that we have our class defined, we can create the remove member function.
02

Create the remove member function

Define the remove member function called "removeUnits" inside the Inventory class. The function will take an integer argument representing the number of units to be removed. ```cpp class Inventory { private: int unitsInStock; public: Inventory(int initialUnits) : unitsInStock(initialUnits) {} int removeUnits(int unitsToRemove); }; ```
03

Implement the remove member function

Finally, implement the removeUnits function to remove the specified number of units and return the number of units remaining in the stock. If the number of units requested to remove is greater than the units in stock, return -1 as an error signal. ```cpp int Inventory::removeUnits(int unitsToRemove) { if (unitsToRemove <= unitsInStock) { unitsInStock -= unitsToRemove; return unitsInStock; } return -1; } ``` With these steps, we have successfully created a remove member function for an inventory system.

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Most popular questions from this chapter

In the definition of a structure variable, the __________ is placed before the variable name.

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