Class definition syntax in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a class named Car.

C++

class [1] {
public:
    int speed;
};

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ACar

Bcar

CVehicle

DSpeed

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'car' instead of 'Car'.

Using a different class name like 'Vehicle'.

The class name should be Car to match the definition.

2fill in blank

medium

Complete the code to declare a public integer member named 'age' inside the class.

C++

class Person {
public:
    [1] age;
};

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Afloat

Bstring

Cint

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'float' or 'string' instead of 'int'.

Using 'bool' which is for true/false values.

The member 'age' should be an integer, so use int.

3fill in blank

hard

Fix the error in the class definition by completing the missing keyword.

C++

class Animal {
    [1]:
    int legs;
};

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Aprivate

Bfriend

Cprotected

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'private' which hides members.

Using 'friend' which is not an access specifier.

To allow access to 'legs' from outside, the member should be public.

4fill in blank

hard

Fill both blanks to define a class with a private string member 'name' and a public integer member 'id'.

C++

class Employee {
    [1]:
    std::string name;

    [2]:
    int id;
};

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Aprivate

Bpublic

Cprotected

Dfriend

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up private and public keywords.

Using 'friend' which is not an access specifier.

The 'name' should be private and 'id' should be public for controlled access.

5fill in blank

hard

Fill all three blanks to define a class 'Book' with a private string 'title', a public integer 'pages', and a protected float 'price'.

C++

class Book {
    [1]:
    std::string title;

    [2]:
    int pages;

    [3]:
    float price;
};

Drag options to blanks, or click blank then click option'

Aprivate

Bpublic

Cprotected

Dfriend

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'friend' as an access specifier.

Confusing protected and private keywords.

The 'title' is private, 'pages' is public, and 'price' is protected to control access appropriately.