This presentation is about the shifting of file content from one file to another. This is done using C programming .

1. FILE Remotio
- Niranjj.S CSE-A

2. Table of Contents
 Introduction
 What to do ?
 Technique used
 How it works ?
 Applications
 Queries

3. File Remotio
CONTENTS
Remotio – shifting
 Introduction
This is about the shifting of files in C language.
 What to do ?
 Technique used
 How it works?
 Applications
 Queries
The basic concept we all know about swapping is
a=5
b=6
after shifting
a=6
b=5
This could be done either by using temporary variable or by swap
function.
but how to do with files…??
Let’s switch to the question

4. Task with Condition
CONTENTS
 Introduction

What to do?
Design a program that circularly swaps the contents of files.
for example 3 files are taken as input then the content of file1
to file 2 then, file2 to file3 then, file3 to file1
 Technique used
The program should scale well to certain number of files.
 How it works?
Also assert the number of words in each file which will also
should be changed when swapping is occurred .
 Applications
 Queries

5. CONTENTS
File5
File1
 Introduction
 What to do ?
Technique used
(pictorial)
File4
File2
 How it works ?
 Applications
 Queries
File3

6. STEP 1: Start the program .
CONTENTS
 Introduction
STEP 2:Include the header files and function prototyes Declare the functions
check and swp which are used then,the integer variables I,n
and bf and aaf with array size 50.
STEP 3: Declare the character variables txtbf and txtaf with array size 50
and assign the name of array as”a.txt”.
STEP 3: Create a file pointer fp of size 50.
 What to do ?
STEP 4: Print the number of files to open and get in n.
Technique used
STEP 5: Initialize i equal to 0 and check whether it is less than n and if so it
will create the new files and the contents will be displayed in file
till n number of times else it will print “file is not created
successfully. “.
(Algorithm)
 How it works?
 Applications
 Queries
STEP 6: Again check the same condition and if it satisfied call the function
check and store the content in bf then by the given statement the
contents are copied to txtbf [].
STEP 7: In the check function it initialize tlen o ‘0’and the count will be
increased till it reaches the EOF (End Of File) and then the len will
be returned .
STEP 8: : Promote the same looping conditions and if it satisfied it calls the
swp function

7. CONTENTS
 Introduction
 What to do ?
Technique used
(Algorithm)
 How it works?
 Applications
 Queries
STEP 9: In the swp function two variables t1 and t2 are created the contents of
file 1 will be copied to t1 and t2 will be placed on file1and then t1 to t2
and the cycle will be continued till the condition satisfies .
STEP 10: At last content of the file and the lengh of the file before and after
swapping will be printed .
STEP 11: Get the output and end the program.

8. #include<stdio.h>
CONTENTS
 Introduction
 What to do ?
 Technique used

How it works?
(Source code)
#include<string.h>
int check(FILE *fp);
void swp(FILE *fp);
void main()
{
int i,n,bf[50],af[50];
char name[6]="a.txt",txtbf[50][50],txtaf[50][50];
FILE *fp[50];
clrscr();
 Applications
printf("Enter number of files to open :");
 Queries
scanf("%d",&n);

9. for(i=0;i<n;i++)
{
CONTENTS
name[0]='a'+i;
 Introduction
if((fp[i]=fopen(name,"w+"))==0)
 What to do ?
{
printf("nFile NOT created successfullyn");
 Technique used
}

How it works?
(Source code)
else
{
 Applications
fprintf(fp[i],"%s%d","contents of file ",i+1);
 Queries
printf("File created successfullyn");
}
}

10. for(i=0;i<n;i++)
{
CONTENTS
bf[i]=check(fp[i]);
 Introduction
rewind(fp[i]);
 What to do ?
fgets(txtbf[i],49,fp[i]);
 Technique used

How it works?
(Source code)
}
for(i=0;i<n;i++)
{
swp(fp[i]);
 Applications
}
 Queries
swp(fp[0]);

11. for(i=0;i<n;i++)
{
CONTENTS
af[i]=check(fp[i]);
 Introduction
rewind(fp[i]);
 What to do ?
fgets(txtaf[i],49,fp[i]);
 Technique used
}
for(i=0;i<n;i++)

How it works?
(Source code)
{
printf("nnBefore swapping : nFILE %d : %s",i+1,txtbf[i]);
 Applications
printf("nlength of FILE %d : %d",i+1,bf[i]);
 Queries
printf("nnAfter swapping : nFILE %d : %s",i+1,txtaf[i]);
printf("nlength of FILE %d : %d",i+1,af[i]);

12. printf("n-------------------------------------------------");}
getch();
CONTENTS
}int check(FILE *fp)
 Introduction
{
int len=0;
 What to do ?
rewind(fp);
 Technique used
while(getc(fp)!=EOF)

How it works?
(Source code)
{
len++;
 Applications
}
 Queries
return len;
}

13. void swp(FILE *fp)// receive fp
CONTENTS
{
char t1[50],t2[50];
 Introduction
rewind(fp);
 What to do ?
fgets(t1,49,fp);
 Technique used
rewind(fp);

fputs(t2,fp);
How it works?
(Source code)
 Applications
 Queries
strcpy(t2,t1);
}

14. CONTENTS
 Introduction
 What to do ?
 Technique used

How it works?
(Output)
 Applications
 Queries

15. CONTENTS
 Introduction
 What to do ?
 Technique used
 How it works?
Applications
 Queries
How it is used
• It will be useful for those who wants to shift the entire
stuff from one place to another that is to transfer the
whole thing.
• It is also useful to analyze the total number of contents
in each file before shifting that is to verify it before it
proceed
• Keeping this as the base and doing further development
this application can be used significantly in many other
aspects