Question

Write a C program that contains a structure that uses predefined types and union. • Create a struct with name, age, kind (Either child, college student, or adult), and kindOfPerson (Either kid, student, or adult) • kids have a school field. Students have college and gpa. Adults have company and salary. • Create one non-dynamic struct with the content for a college student: "Bob", 20, K-State, 3.5 • Create one struct dynamically for a kid with: "Alison", 10, "Amanda Arnold Elementary" • Implement a function that can be used to display the contents of a single structure • Print out both structures • Free up the memory allocated before exiting

Answer 1

Simple structure

#include<stdio.h>

#include<string.h>

struct str1

{

char name[20];

int age;

char kind[20];

char kindOfPerson[20]

};

Non dynamic struct :

struct student

{

char name[20];

int age;

char college[30];

double salary;

};

int main()

{

struct student record = {0}; //initializing null

strcpy(record.name,"Bob");

record.age=20;

strcpy(record.college,"K-State");

record.salary=3.5;

printf(" Name is: %d \n", record.name);

printf(" Age is: %d \n", record.age);

printf(" College is: %d \n", record.college);

printf(" Salary is: %d \n", record.salary);

}

Dynamic structure:

#include<stdio.h>

#include<stdlib.h>

struct kid
{
   char name[20];
   int age;
   char school[30];
};

int main()
{
   struct kid *ptr;
   int i, noOfRecords;
   printf("Enter number of records: ");
   scanf("%d", &noOfRecords);

   // Allocates the memory for noOfRecords structures with pointer ptr pointing to the base address.
   ptr = (struct kid*) malloc (noOfRecords * sizeof(struct course));

   for(i = 0; i < noOfRecords; ++i)
   {
       printf("Enter name,age and school of the kid respectively:\n");
       scanf("%s %d %s", &(ptr+i)->name, &(ptr+i)->age, &(ptr+i)->school);
   }

   printf("Displaying Information:\n");

   for(i = 0; i < noOfRecords ; ++i)
       printf("%s\t%d\n%d\n", (ptr+i)->name, (ptr+i)->age, (ptr+i)->school);

   return 0;
}

Implementing function

For ex if we want to display the contents of structure student then we can write a function as shown below :

void display(struct student stu) // in arguments the structure name is passed

{

//print details

}