Example Program using Structures and Pointers

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

int main()
{
    struct person *personPtr, person1;
    personPtr = &person1;   

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

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

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

    return 0;
}

C:\TDM-GCC-64>gcc 4_pointer_Structure_3.c
C:\TDM-GCC-64>a
Enter age: 3
Enter weight: 10
Displaying:
Age: 3
weight: 10.000000

#include<stdio.h>
struct student{
   int sno;
   char sname[30];
   float marks;
};
int main ( )
{
   struct student s;
   struct student *st;
   printf("enter sno, sname, marks:");
   scanf ("%d%s%f", & s.sno, s.sname, &s. marks);
   st = &s;
   printf ("details of the student are");
   printf ("Number = %d\n", st ->sno);
   printf ("name = %s\n", st->sname);
   printf ("marks =%f\n", st ->marks);
   return 0;
}

C:\TDM-GCC-64>gcc 4_pointer_Structure_4.c
C:\TDM-GCC-64>a
enter sno, sname, marks:101
abc
90
details of the student areNumber = 101
name = abc
marks =90.000000