9lab

//---------------------------------------------------------------------------

#pragma hdrstop

//---------------------------------------------------------------------------

#pragma argsused

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

int ReadnPrint (char *filename1, char *filename2, char *filename3)
{
 FILE *f,*g,*h;
 char line1[500], line2[500], line3[500]; char c;
  if((f=fopen(filename1,"rt"))==NULL)
   printf("File could not be opened\n");
  if((g=fopen(filename2,"rt"))==NULL)
   printf("File could not be opened\n");
  if((h=fopen(filename3,"wt"))==NULL)
   printf("File could not be opened\n");
  while (fgets(line1,500,f)!=NULL && fgets(line2,500,g)!=NULL)
  {
    fputs(line1,h);
   if(strcmp(line2, line1)!=0)
    fputs(line2,h);
  }
  fclose(f);
  fclose(g);
  fclose(h);
  return 0;
}

int main ()
{
 char *filename1="F:\\1.txt";
 char *filename2="F:\\2.txt";
 char *filename3="F:\\3.txt";
 ReadnPrint ("F:\\1.txt","F:\\2.txt","F:\\3.txt");
 printf("Operation Complete.");
 getchar();
 return 0;
}