STRUCTURE AND POINTER 

1. ACCESS MEMBER OF STRUCTURE USING POINTER 

To access members of a structure using pointers, we use the -> operator.

Syntax: 

#include <stdio.h>

// Define a structure
struct Person {
    char name[50];
    int age;
};

int main() {
    // Declare a structure variable and a pointer variable 
    struct Person p, *ptr;
    ptr=&p;
---------------------
---------------------
}

Example:

#include <stdio.h>
struct person
{
   int age;
   float weight;
};

int main()
{
    struct person *Ptr, p;
    Ptr = &p;   

    printf("Enter age: ");
    scanf("%d", &Ptr->age);

    printf("Enter weight: ");
    scanf("%f", &Ptr->weight);

    printf("Displaying:\n");
    printf("Age: %d\n", Ptr->age);
    printf("weight: %f", Ptr->weight);

    return 0;
}

2.  POINTER AS MEMBER OF STRUCTURE 

Syntax:

struct test
{
    char name[20];
    int *age;
};

struct test t1, *ptr ;
ptr=&t1;
-------
-------

Example: 

#include<stdio.h>

struct student
{
    char *name[10];
    int age;
    char *marks[5];
};

int main()
{
    struct student stu = {
                             "Ramesh",
                             25,
                             {77,80,75,79,65 }
                         };

    struct student *ptr= &stu;
    int i;

    printf("Accessing members using structure variable: \n\n");

    printf("Name: %s\n", stu.name);
    printf("Age: %d\n", stu.age);

    for(i = 0; i < 5; i++)
    {
        printf("Subject : %s \n", stu.marks[i]);
    }

    printf("\n\nAccessing members using pointer variable: \n\n");

    printf("Name: %s\n", ptr->name);
    printf("Age: %d\n", ptr->age);

    for(i = 0; i < 5; i++)
    {
        printf("Subject : %s \n", ptr->subjects[i]);
    }

    return 0;
}