Reusability and maintenance - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a reusable function that adds two integers.

C

int add(int a, int b) {
    return a [1] b;
}

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

Forgetting to return the result.

The + operator adds two integers, which is what the function should do.

2fill in blank

medium

Complete the code to call the function add with arguments 5 and 3.

C

int result = [1](5, 3);

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Aadd

Bsum

Ccalculate

Dtotal

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different function name that does not exist.

Forgetting to use parentheses for the function call.

The function is named add, so calling add(5, 3) is correct.

3fill in blank

hard

Fix the error in the function prototype to ensure proper reusability.

C

int [1](int a, int b);

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

AaddNumbers

BAdd

Cadd

Daddition

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different or capitalized function name.

Mismatching the prototype and definition names.

The function prototype must match the function name exactly, which is add.

4fill in blank

hard

Fill both blanks to create a reusable function that multiplies two numbers and returns the result.

C

int [1](int x, int y) {
    return x [2] y;
}

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

Amultiply

B+

C*

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or subtraction instead of multiplication.

Using a function name that does not describe multiplication.

The function name multiply describes the operation, and the * operator multiplies the two numbers.

5fill in blank

hard

Fill all three blanks to create a reusable function that checks if a number is even and returns 1 if true, else 0.

C

int [1](int num) {
    if (num [2] 2 [3] 0) {
        return 1;
    } else {
        return 0;
    }
}

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

AisEven

B%

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect operators like != instead of ==.

Choosing a function name that does not describe the check.

The function name isEven clearly states its purpose. The modulus operator % checks the remainder, and == compares it to zero to determine evenness.