Data Communication network(DCN) program to implement the peer to peer (chatting) application.

Write a program to implement the peer to peer (chatting) application.

Program Code:

#include<stdio .h="">

#include<conio .h="">

void main()

{

 FILE *fs,*ft;

 char ch,str[40];

 char s[80];

 clrscr();

 fs=fopen("sample.txt","w+");

 if(fs==NULL)

 {

  puts("\nCannot open source file");

  exit();

 }

 ft=fopen("sample2.txt","w");

 if(ft==NULL)

 {

  puts("\nCannot open target file");

  fclose(fs);

  exit();

 }

 printf("\n Enter the text to be sent...\n");

 while(strlen(gets(str))&gt;0)

 {

  fputs(str,fs);

  fputs("\n",fs);

 }

 rewind(fs);

 while(1)

 {

  ch=fgetc(fs);

  if(ch==EOF)

  break;

  else

  fputc(ch,ft);

 }

 fclose(fs);

 fclose(ft);

 printf("\n After reading contents from receiver:\n");

 ft=fopen("sample2.txt","r");

 if(ft==NULL)

 {

 puts("\n cannot open");

 exit();

 }

Output:

Enter the text to be sent...

The Final submission of DCN

(Practicals)

 After reading contents from receiver:

The Final submission of DCN

(Practicals)</conio></stdio>