C Program to use DMA in Structure and Write All Records to FILE and Read All Records from FILE

Q. Write a C code to keep record of n number of family members using structure and write to a FILE and read from it and display on console.

OR

Q. Write a C program to write any members of structure to a file using fwrite(). Read the contents from the file using fread() and display on the screen.

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

struct family

{

  char name[30];

  int age;

};

void main()

{

  struct family *f1,*f2;

  int i,n;

  FILE *fptr;

  fptr=fopen("D:\\sentence.txt","wb");

  printf("Enter number of family members: ");

  scanf("%d",&n);

  f1=(struct family*)malloc(n*sizeof(struct family));

  f2=(struct family*)malloc(n*sizeof(struct family));

  for(i=0;i<n;i++)

  {

    fflush(stdin);

    printf("\nFor member %d",i+1);

    printf("\nEnter name: ");

    gets(f1->name);

    printf("Enter age: ");

    scanf("%d",&f1->age);

    fwrite(f1,sizeof(struct family),1,fptr);

  }

  fclose(fptr);

  fptr=fopen("D:\\sentence.txt","rb");

  if(fptr==NULL)

  {

    printf("File could not be opened");

    exit(1);

  }

  

  printf("\n\nDisplaying from the FILE:");

  for(i=0;i<n;i++)

  {

    fread(f2,sizeof(struct family),1,fptr);

    printf("\nName: %s\tAge: %d",f2->name,f2->age);

  }

  fclose(fptr);

  getch();

}

OUTPUT:

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