Quiz: Functions

Introduction

Quiz: Functions checks how well you can apply Function prototype purpose and Return type void (and related ideas) in C. Try each prompt in a scratch file before moving on.

Understanding the topic

Challenge 1 In your own words — or with a tiny program — show that you understand: Function prototype purpose.

Challenge 2 In your own words — or with a tiny program — show that you understand: Return type void.

Challenge 3 In your own words — or with a tiny program — show that you understand: Recursion base case.

Challenge 4 In your own words — or with a tiny program — show that you understand: Scope of local variables.

• Challenge 1 — In your own words — or with a tiny program — show that you understand: Function prototype purpose.
• Challenge 2 — In your own words — or with a tiny program — show that you understand: Return type void.
• Challenge 3 — In your own words — or with a tiny program — show that you understand: Recursion base case.
• Challenge 4 — In your own words — or with a tiny program — show that you understand: Scope of local variables.

Step-by-step explanation

1. Challenge 1 — In your own words — or with a tiny program — show that you understand: Function prototype purpose.
2. Challenge 2 — In your own words — or with a tiny program — show that you understand: Return type void.
3. Challenge 3 — In your own words — or with a tiny program — show that you understand: Recursion base case.
4. Challenge 4 — In your own words — or with a tiny program — show that you understand: Scope of local variables.

Execution workflow

Best practices

• Enable warnings: gcc -Wall -Wextra -std=c11 source.c -o app
• Give every variable a defined value before it is read.
• Stay inside array bounds — C will not stop you from over-running a buffer.

Common mistakes

• Reading uninitialized storage — behavior is undefined.
• Dismissing compiler warnings instead of fixing root causes.
• Ignoring NULL returns from malloc, fopen, and similar APIs.

Hands-on exercise

Practice problems:

• Build or explain: Function prototype purpose
• Build or explain: Return type void
• Build or explain: Recursion base case
• Build or explain: Scope of local variables

Summary

Quiz: Functions in C — Self-check on prototypes, scope, and recursion.