Nested Structures

Nested Structures

A struct can contain other structs. That's nesting - building big types from smaller ones.

A struct inside a struct

struct Address {
    char street[50];
    int number;
};

struct Person {
    char name[50];
    struct Address home;
};

The Person struct contains an Address.

Accessing nested fields

Chain the dots:

person1.home.number = 42;
printf("%d", person1.home.number);

Initializing a nested struct

struct Person p = {"Ada", {"Main St", 42}};

Why nesting?

It models reality: a person has an address, an address has a street and number. Nested structs mirror that shape.

TL;DR

• Structs can hold other structs.
• Access nested fields with chained dots.
• p.home.number reads the nested field.
• Nesting mirrors real-world relationships.