WAP to Reads records from binary file and displays them on VDU

/*WAP to Reads records from binary file and displays them on VDU */

#include "stdio.h"
main( )
{
 FILE  *fp ;
 struct emp 
 {
  char  name[40] ;
  int  age ;
  float  bs ; 
 } ;
 struct emp  e ;

 fp = fopen ( "EMP.DAT", "rb" ) ;

 if ( fp == NULL )
 {
  puts ( "Cannot open file" ) ;
  exit( ) ;
 }

 while ( fread ( &e, sizeof ( e ), 1, fp ) == 1 )
  printf ( "\n%s %d %f", e.name, e.age, e.bs ) ; 

 fclose ( fp ) ;
}

WAP to Read records from a file using structure

/*WAP to Read records from a file using structure */

#include "stdio.h"
main( )
{
 FILE  *fp ;
 struct emp 
 {
  char  name[40] ;
  int  age ;
  float  bs ;
 } ;
 struct emp  e ;

 fp = fopen ( "EMPLOYEE.DAT", "r" ) ;

 if ( fp == NULL )
 {
  puts ( "Cannot open file" ) ;
  exit( ) ;
 }

 while ( fscanf ( fp, "%s %d %f", e.name, &e.age, &e.bs ) != EOF )
  printf ( "\n%s %d %f", e.name, e.age, e.bs ) ; 

 fclose ( fp ) ;
}

WAP to read a file and write(copy) data in another file

/*WAP to read a file and write(copy) data in another file*/

#include<stdio.h>
#include<conio.h>
main( )
{
 FILE  *fs, *ft ;
 char  ch ;

 fs = fopen ( "pr1.c", "r" ) ;
 if ( fs == NULL )
 {
  puts ( "Cannot open source file" ) ;
  exit( ) ;
 }

 ft = fopen ( "pr2.c", "w" ) ;
 if ( ft == NULL )
 {
  puts ( "Cannot open target file" ) ;
  fclose ( fs ) ;
  exit( ) ;
 }

 while ( 1 )
 {
  ch = fgetc ( fs ) ;

  if ( ch == EOF )
   break ;
  else
   fputc ( ch, ft ) ;
 }

 fclose ( fs ) ;
 fclose ( ft ) ;
       getch();
}

WAP to Count chars, spaces, tabs and newlines in a file

/*WAP to Count chars, spaces, tabs and newlines in a file*/

#include<stdio.h>
#include<conio.h>
main( )
{
 FILE  *fp ;
 char  ch ;
 int  nol = 0, not = 0, nob = 0, noc = 0 ;
 
 fp = fopen ( "PR1.C", "r" ) ;

 while ( 1 )
 {
  ch = fgetc ( fp ) ;

  if ( ch == EOF )
   break ;

  noc++ ;

  if ( ch == '  ' )
   nob++ ;

  if ( ch == '\n' )
   nol++ ;

  if ( ch == '\t' )
   not++ ;
 }

 fclose ( fp ) ;
 printf ( "\nNumber of characters = %d", noc ) ;
 printf ( "\nNumber of blanks = %d", nob ) ;
 printf ( "\nNumber of tabs = %d", not ) ;
 printf ( "\nNumber of lines = %d", nol ) ;
       getch();
}

WAP to check existing file empty or not

/*WAP to check existing file empty or not*/

#include<stdio.h>
#include<conio.h>
main( )
{
 FILE  *fp ;

 fp = fopen ( "PR1.C", "r" ) ;
 if ( fp == NULL )
 {
  puts ( "cannot open file" ) ;
  exit( ) ;
 }
       getch();
}

WAP to Display contents of a file on screen

/*WAP to Display contents of a file on screen*/

#include<stdio.h>
#include<conio.h>

main( )
{
 FILE  *fp ;
 char  ch ;
 
 fp = fopen ( "PR1.C", "r" ) ;

 while ( 1 )
 {
  ch = fgetc ( fp ) ;

  if ( ch == EOF )
   break ;

  printf ( "%c", ch ) ;
 }

 fclose ( fp ) ;
  getch();
}