Question

What is the difference between typedef and the struct tag structure variable?

Answer 1

Typedef is used to create a new name for an existing type, whereas a struct tag is used to define a new data structure. Typedef can be used with struct tags to simplify the syntax when declaring variables of the structured type.

Step-by-step explanation:

The difference between typedef and the struct tag in C programming is related to how they are used to define types and variables. A struct tag is used to define a new data structure, while typedef is used to create an alias for an existing type, which can include a structure defined with a struct tag.

Here's an example using both:

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

typedef struct PersonTag Person;

In the above example, struct PersonTag defines a new data structure with two members: name and age. Then, typedef is used to create an alias called Person for the type struct PersonTag, so that we can simply write Person instead of struct PersonTag when declaring variables of this type.