Character arrays - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a character array named name with space for 10 characters.

C

char name[[1]];

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

A5

B20

C15

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using a size smaller than needed.

Forgetting the brackets.

The array size must be 10 to hold 10 characters.

2fill in blank

medium

Complete the code to initialize the character array word with the string "hello".

C

char word[] = [1];

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

A"hello"

B'h','e','l','l','o'

Chello

D'hello'

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes for strings.

Not using quotes at all.

Strings in C must be enclosed in double quotes.

3fill in blank

hard

Fix the error in the code to correctly copy the string "cat" into the character array pet.

C

#include <string.h>

char pet[4];
strcpy(pet, [1]);

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

A'cat'

Bcat

C"cat"

Dpet

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes for strings.

Passing a variable name instead of a string.

The string to copy must be a string literal in double quotes.

4fill in blank

hard

Fill both blanks to create a character array greeting initialized with "hi" and print it using printf.

C

#include <stdio.h>

char greeting[[1]] = [2];
printf("%s\n", greeting);

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

A3

B"hi"

C2

D'hi'

Attempts:

3 left

💡 Hint

Common Mistakes

Setting array size too small.

Using single quotes for strings.

The array size must be 3 to hold 'h', 'i', and the null character. The string must be in double quotes.

5fill in blank

hard

Fill all three blanks to declare a character array text, initialize it with "ok", and print its length using strlen.

C

#include <stdio.h>
#include <string.h>

char [1][] = [2];
int length = strlen([3]);
printf("Length: %d\n", length);

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

Atext

B"ok"

Dok

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes for strings.

Passing the string literal instead of the array to strlen.

The array name is 'text', initialized with the string "ok", and strlen needs the array name to get length.