10.12 LAB: Instrument informationGiven main() and the Instrument class, define a derived class, StringInstrument, for string instruments.Ex. If the input is:Drums Zildjian 2015 2500 Guitar Gibson 2002 1200 6 19the output is:Instrument Information: Name: Drums Manufacturer: Zildjian Year built: 2015 Cost: 2500 Instrument Information: Name: Guitar Manufacturer: Gibson Year built: 2002 Cost: 1200 Number of strings: 6 Number of frets: 19 **Lab Activity: Instrument Information (10.12.1)****Current File: StringInstrument.cpp**```cpp#include "StringInstrument.h"// TODO: Define mutator functions -// SetNumOfStrings(), SetNumOfFrets()// TODO: Define accessor functions -// GetNumOfStrings(), GetNumOfFrets()```**Overview:**This code is part of a lab activity focused on developing an understanding of mutator and accessor functions within a C++ class.**Key Concepts:**1. **Mutator Functions**: These functions are used to modify private data members of a class. In this example, you are tasked with defining: - `SetNumOfStrings()` - `SetNumOfFrets()`2. **Accessor Functions**: These functions are used to retrieve the values of private data members. You need to define: - `GetNumOfStrings()` - `GetNumOfFrets()`**Objective:**Complete the TODO sections by implementing the specified functions to manage the properties of a string instrument, such as the number of strings and frets. This exercise will help solidify your grasp on encapsulation and data management within object-oriented programming. ```cpp#ifndef STR_INSTRUMENTH#define STR_INSTRUMENTH#include "Instrument.h"class StringInstrument : public Instrument { // TODO: Declare private data members: numStrings, numFrets // TODO: Declare mutator functions - // SetNumOfStrings(), SetNumOfFrets() // TODO: Declare accessor functions - // GetNumOfStrings(), GetNumOfFrets()};#endif```### ExplanationThis code snippet is a C++ header file named `StringInstrument.h` which defines a class for string instruments. The `StringInstrument` class publically inherits from the `Instrument` class. It is structured for enhancements, such as adding data members and accessor/mutator functions. Here's a breakdown:- **Header Guards**: - `#ifndef` and `#define` are used to prevent multiple inclusions of the same header file, which can cause errors during compilation.- **Inheritance**: - `class StringInstrument` inherits from the `Instrument` class, suggesting that it builds on the basic functionality of `Instrument`.- **Placeholders**: - Comments indicate placeholders for private data members `numStrings` and `numFrets`. - Mutator functions `SetNumOfStrings()` and `SetNumOfFrets()` are intended for setting the values of these members. - Accessor functions `GetNumOfStrings()` and `GetNumOfFrets()` are for retrieving the values.The file is structured to implement additional functionality for managing characteristics specific to string instruments.

File name: "Instrument.h" #ifndef Instrument_H #define Instrument_H using namespace std; class…

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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10.12 LAB: Instrument information

Given main() and the Instrument class, define a derived class, StringInstrument, for string instruments.

Ex. If the input is:

Drums Zildjian 2015 2500 Guitar Gibson 2002 1200 6 19

the output is:

Instrument Information: Name: Drums Manufacturer: Zildjian Year built: 2015 Cost: 2500 Instrument Information: Name: Guitar Manufacturer: Gibson Year built: 2002 Cost: 1200 Number of strings: 6 Number of frets: 19

**Lab Activity: Instrument Information (10.12.1)**

**Current File: StringInstrument.cpp**

```cpp
#include "StringInstrument.h"

// TODO: Define mutator functions -
// SetNumOfStrings(), SetNumOfFrets()

// TODO: Define accessor functions -
// GetNumOfStrings(), GetNumOfFrets()
```

**Overview:**

This code is part of a lab activity focused on developing an understanding of mutator and accessor functions within a C++ class.

**Key Concepts:**

1. **Mutator Functions**: These functions are used to modify private data members of a class. In this example, you are tasked with defining:
- `SetNumOfStrings()`
- `SetNumOfFrets()`

2. **Accessor Functions**: These functions are used to retrieve the values of private data members. You need to define:
- `GetNumOfStrings()`
- `GetNumOfFrets()`

**Objective:**

Complete the TODO sections by implementing the specified functions to manage the properties of a string instrument, such as the number of strings and frets. This exercise will help solidify your grasp on encapsulation and data management within object-oriented programming.

```cpp
#ifndef STR_INSTRUMENTH
#define STR_INSTRUMENTH

#include "Instrument.h"

class StringInstrument : public Instrument {
// TODO: Declare private data members: numStrings, numFrets

// TODO: Declare mutator functions -
// SetNumOfStrings(), SetNumOfFrets()

// TODO: Declare accessor functions -
// GetNumOfStrings(), GetNumOfFrets()
};

#endif
```

### Explanation

This code snippet is a C++ header file named `StringInstrument.h` which defines a class for string instruments. The `StringInstrument` class publically inherits from the `Instrument` class. It is structured for enhancements, such as adding data members and accessor/mutator functions. Here's a breakdown:

- **Header Guards**:
- `#ifndef` and `#define` are used to prevent multiple inclusions of the same header file, which can cause errors during compilation.

- **Inheritance**:
- `class StringInstrument` inherits from the `Instrument` class, suggesting that it builds on the basic functionality of `Instrument`.

- **Placeholders**:
- Comments indicate placeholders for private data members `numStrings` and `numFrets`.
- Mutator functions `SetNumOfStrings()` and `SetNumOfFrets()` are intended for setting the values of these members.
- Accessor functions `GetNumOfStrings()` and `GetNumOfFrets()` are for retrieving the values.

The file is structured to implement additional functionality for managing characteristics specific to string instruments.

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