Pointer declaration - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a pointer to an integer.

C

int [1] ptr;

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

A*

B&

C#

D%

Attempts:

3 left

💡 Hint

Common Mistakes

Using & instead of * to declare a pointer.

Forgetting the * symbol entirely.

The asterisk (*) is used to declare a pointer variable in C.

2fill in blank

medium

Complete the code to declare a pointer to a character.

C

char [1] ch_ptr;

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

A&

B$

C^

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using & instead of * for pointer declaration.

Using symbols like ^ or $ which are invalid here.

The asterisk (*) is used to declare a pointer variable, here pointing to a char.

3fill in blank

hard

Fix the error in the pointer declaration.

C

float [1] ptr;

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

A*

B#

C&

D@

Attempts:

3 left

💡 Hint

Common Mistakes

Placing & instead of *.

Using invalid symbols like # or @.

The asterisk (*) must be placed before the pointer variable name to declare a pointer.

4fill in blank

hard

Fill both blanks to declare a pointer to a double and initialize it to NULL.

C

double [1] ptr = [2];

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

A*

BNULL

C0

D&

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 instead of NULL for pointer initialization.

Using & instead of * for pointer declaration.

The asterisk (*) declares the pointer, and NULL initializes it to point to nothing.

5fill in blank

hard

Fill all three blanks to declare a pointer to a constant integer and initialize it to NULL.

C

const int [1] ptr = [2]; // pointer to constant int

[3] value = 10;

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

A*

BNULL

Cint

D&

Attempts:

3 left

💡 Hint

Common Mistakes

Using & instead of * for pointer declaration.

Using wrong variable type for value.

Initializing pointer with 0 instead of NULL.

The asterisk (*) declares the pointer, NULL initializes it, and int declares the variable type.