Chapter 9: Structures and Enums

Table of Contents

• Table of Contents
• 9.1 Structures
• 9.2 Enumerations
• 9.3 Exercises
• 9.4 Solutions
  • 9.4.1 Solution 1
  • 9.4.2 Solution 2
  • 9.4.3 Solution 3
• 9.5 What’s Coming in the Next Chapter

9.1 Structures

Structures group related variables:

struct Point {
    int x;
    int y;
};

9.2 Enumerations

Enums define named integer constants:

enum Color { RED, GREEN, BLUE };

9.3 Exercises

1. Define a structure for a student with name and age.
2. Write a function that takes a struct as a parameter.
3. What is the default value of the first enum constant?

9.4 Solutions

9.4.1 Solution 1

struct Student {
    char name[50];
    int age;
};

9.4.2 Solution 2

void printStudent(struct Student s) {
    printf("%s %d\n", s.name, s.age);
}

9.4.3 Solution 3

Zero (0).

9.5 What’s Coming in the Next Chapter

Next, you’ll learn about file I/O in C!

Next Chapter → File I/O – Talking to the Filesystem