Program to create a data file to store student information Such as Roll. No., Name, Class and Total Marks. Copy those Records to where total marks is more than 400 to another File. Display the contents of both.

#include<stdio.h>

main()

{

      FILE *f1,*f2;

      char ans,name[25],class[8];

      int rno,i,tot;

      clrscr();

      f1=fopen("STUD.DAT","w");

      do

      {

            printf("\nEnter the Roll No.:\n");

            scanf("%d",&rno);

            printf("\nEnter the name\n");

            scanf("%s",name);

            printf("\nEnter the class\n");

            scanf("%s",class);

            printf("\nEnter the Marks:\n");

            scanf("%d",&tot);

            fprintf(f1,"\n%d%s%s%d",rno,name,class,tot);

            fflush(stdin);

            printf("\nContinue Input?");

            scanf("%c",&ans);

      }while(ans=='Y'||ans=='y');

      fclose(f1);

      f1=fopen("STUD.DAT","r");

      f2=fopen("MARKS.DAT","w");

      while(fscanf(f1,"%d%s%s%d",&rno,name,class,&tot)!=EOF)

      {

            if(tot>400)

            {

                  fprintf(f2,"\n%d%s%s%d",rno,name,class,tot);

            }

      }

      fclose(f1);

      fclose(f2);

      printf("\nThe contents of the files are:");

      f1=fopen("STUD.DAT","r");

      f2=fopen("MARKS.DAT","r");

            while((fscanf(f1,"%d%s%s%d",&rno,name,class,&tot))!=EOF)

      printf("\nRoll NO.: %d, Name: %s Class: %s Marks: %d",rno,name,class,tot);

      printf("\nContents of the File 2 are:");

      while((fscanf(f2,"%d%s%s%d",&rno,name,class,&tot))!=EOF)

      {

            printf("\nR.No: %d  Name: %s  Class:%s   Total=%d",rno,name,class,tot);

      }

      fclose(f1);

      fclose(f2);

      getch();

}