Passing Structures to a Function in C

What is passing a structure to a function in C?

Definition:

Passing a structure to a function means sending structure data as an argument to a function.

Program:

#include <stdio.h>

struct student {

int id;

};

void display(struct student s) {

printf("%d", s.id);

}

int main() {

struct student s1 = {10};

display(s1);

return 0;

}

What is passing individual elements of a structure to a function?

Definition:

Passing individual elements means sending each member of the structure separately to a function.

Program:

#include <stdio.h>

struct student {

int id;

};

void display(int x) {

printf("%d", x);

}

int main() {

struct student s1 = {20};

display(s1.id);

return 0;

}

What is passing whole structure to a function?

Definition:

Passing whole structure means sending the complete structure variable as a single argument to a function.

Program:

#include <stdio.h>

struct book {

int price;

};

void show(struct book b) {

printf("%d", b.price);

}

int main() {

struct book b1 = {150};

show(b1);

return 0;

}

Write the difference between passing individual elements and whole structure.

Definition:

Individual elements are passed separately , while the whole structure is passed as one argument

program:

// Individual element passing

display(s1.id);

// Whole structure passing

display(s1);