To Be Familiarize With Data Files in C

1. WAP to enter a sentence in a file and display its contents.
2. WAP to read a file and count how many alphabets, spaces and words are there in file.
3. WAP to copy the data of a file into another file and display the content of destination file
4. WAP to read the information about the bie like name, lot no and cost into a file. Enter information of 4 bikes and display the total cost of all bikes.
5. WAP to enter name ,age and basic salary of employees until user inputs "NO". Display record of employees from a file whose salary is less than 1000.

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1.) Question 1

#include <stdio.h>

 #include <conio.h>

 #include <process.h>

 void main ()

 {

 FILE *fp;

 char ch;

 clrscr ();

 fp=fopen("abc.txt","w+");

 if (fp==NULL)

 exit(0);

 fprintf (fp,"This is Good.\n");

 fclose (fp);

 fp=fopen ("abc.txt","r");

 if(fp==NULL)

 exit (0);

 while (1)

    {

    ch=fgetc(fp);

    if (ch==EOF)

    break ;

    else

    putchar (ch);

    }

    fclose (fp);

  getch ();

 }

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2.) Question 2

#include <stdio.h>

 #include <conio.h>

 #include <process.h>

 void main ()

 {

 FILE *fp;

 char ch;

 int al=0,sp=0,wd=0;

 clrscr ();

 fp=fopen ("abc.txt","r");

 if(fp==NULL)

 exit (0);

 while (1)

    {

    ch=fgetc(fp);

     if (ch==EOF)

    break ;

    else

    {

    if ((ch>='a'&& ch<='z')||(ch>='A'&&ch<='Z'))

    al++;

    else if (ch==' ')

    sp++;

    else

    wd=sp+1;

    }

   }

    printf ("Alphabet=%d  Space=%d   Word=%d",al,sp,wd);

    fclose (fp);

  getch ();

 }

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3.) Question 3

#include <stdio.h>

 #include <conio.h>

 #include <process.h>

 void main ()

 {

 FILE *fp,*p;

 char ch;

 clrscr ();

 fp=fopen ("abc.txt","r");

 p=fopen ("xyz.txt","w");

 while (1)

    {

    ch=fgetc(fp);

    if (ch==EOF)

    break ;

    else

    fputc (ch,p);

    }

    fclose (p);

    fclose (fp);

    p=fopen ("xyz.txt","r");

    if (p==NULL)

    exit (0);

    while (1)

      {

      ch=fgetc(p);

      if(ch==EOF)

      break;

      else

    printf ("%c",ch);

      }

   fclose (p);

  getch ();

 }

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4.) Question 4

#include <stdio.h>

#include <conio.h>

#include <process.h>

#include <string.h>

void main ()

{

char name [10],ch;

int lot, price,i,tot=0;

FILE *fp;

clrscr ();

fp=fopen("lab134t.txt","w");

if (fp==NULL)

exit (0);

for (i=0;i<5;i++)

 {

 printf ("Enter name,age & salary: ");

 scanf ("%s %d %d",name,&lot,&price);

 fprintf (fp,"%s %d %d",name,lot,price);

 fflush (stdin);

 }

 fclose (fp);

 fp=fopen ("lab134t.txt","r");

 rewind (fp);

 if (fp==NULL)

 exit(0);

 for (i=0;i<5;i++)

 {

  tot+=price;

 }

 printf ("The total price is %d.",tot);

 fclose (fp);

 getch ();

}

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5.) Question 5

#include <stdio.h>

#include <conio.h>

#include <process.h>

#include <string.h>

void main ()

{

char name [10],ch;

int age, sal;

FILE *fp;

clrscr ();

fp=fopen("lab135t.txt","w");

if (fp==NULL)

exit (0);

do

 {

 printf ("Enter name,age & salary: ");

 scanf ("%s %d %d",name,&age,&sal);

 fprintf (fp,"%s %d %d",name,age,sal);

 fflush (stdin);

 printf ("Do you want more?y/n  ");

 scanf ("%c",&ch);

 } while (ch!='n');

 fclose (fp);

 fp=fopen ("lab135t.txt","r");

 rewind (fp);

 if (fp==NULL)

 exit(0);

 printf ("The record of employee whose salary is less than 1000 is:\n");

 while ((fscanf (fp,"%s %d %d",name,&age,&sal))!=EOF)

 {

 if (sal<=1000)

 printf ("Name: %s\nage: %d\nsalary:%d\n ",name,age,sal);

 }

 fclose (fp);

 getch ();

}