Accessing structure members in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to access the member age of the structure variable person.

C++

struct Person {
    int age;
};

Person person;
person.[1] = 25;

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

Aweight

Bheight

Cname

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong member name.

Trying to use arrow operator (->) with a structure variable instead of a pointer.

The dot operator (.) is used to access members of a structure variable. Here, person.age accesses the age member.

2fill in blank

medium

Complete the code to access the member salary of the structure pointer empPtr.

C++

struct Employee {
    double salary;
};

Employee* empPtr;
double s = empPtr[1]salary;

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

A.

B->

C*

D&

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot operator with a pointer variable.

Dereferencing pointer incorrectly.

The arrow operator (->) is used to access members of a structure through a pointer.

3fill in blank

hard

Fix the error in accessing the member id of the structure pointer studentPtr.

C++

struct Student {
    int id;
};

Student* studentPtr;
int studentId = studentPtr[1]id;

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

A->

B.

C*

D&

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot operator with a pointer.

Trying to dereference pointer manually before accessing member.

To access a member of a structure through a pointer, use the arrow operator (->).

4fill in blank

hard

Fill the blank to correctly access the member score of the structure pointer ptr.

C++

struct Result {
    int score;
};

Result* ptr;
int s = (*ptr)[1]score;

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

A.

B&

C*

D->

Attempts:

3 left

💡 Hint

Common Mistakes

Using arrow operator directly on dereferenced pointer.

Trying to use dot operator on pointer without dereferencing.

When dereferencing a pointer to access a member, use (*ptr).score. The dot operator is used after dereferencing the pointer to get the structure.

5fill in blank

hard

Fill both blanks to create a pointer to a structure and access its member value.

C++

struct Data {
    int value;
};

Data d = {10};
Data[1] ptr = [2];
int val = ptr->value;

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

A*

B&d

C->

D&

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the * when declaring a pointer.

Using dot operator instead of arrow operator to access member via pointer.

To create a pointer to a structure, use Data* ptr. To assign the address of d, use ptr = &d.