Курсовик3

#include <stdio.h>
#include <iostream.h>
#include <conio.h>
#include <stdlib.h>
FILE *mfclose(FILE *fl)
{
  fclose(fl);
  return 0;
};
int main(void)
{
  FILE *fl1=NULL,*fl2=NULL;
  char *name,buf1,buf2,*name1;
  for(char r='y';r=='y';)
  {
    clrscr();
    while(fl1==NULL)
    {
      cout << "Enter name of source file: \n >";
      gets(name);
      if((fl1=fopen(name,"r"))==NULL)
	{
	  perror("While file was opening, there were some errors");
	  cout<<"\n Restart program (y/n) \n >";
	  cin>>r;
	  if(r=='n') return 0;
	};
    };
    cout<<"\n\n***Sourse file :: "<<name<<"***\n\n";
    buf1=' ';
    while(buf1!=EOF)
    {
      buf1=getc(fl1);
      cout<<buf1;
    };
    cout<<"\n>>EOF\n\nEnter char for replacing \n >";
    cin >> buf2;
    fl1=mfclose(fl1);
    fl1=fopen(name,"r");
    buf1=' ';
    cout<<"\n>>EOF\n\n***Modified text***\n\n";
    while(buf1!=EOF)
    {
      if(buf2!=(buf1=getc(fl1)))
	cout << buf1;
      else
	cout<<"\n";
    };
    fl1=mfclose(fl1);
    fl2=mfclose(fl2);
    cout<<"\n>>EOF\n\n***Save this modified text? (y/n) \n >";
    cin>>r;
    buf1=' ';
    if(r=='y')
      {
	while(fl2==NULL&&r=='y')
	  {
	    cout<<"Enter name of new file to save modified text: \n >";
	    gets(name1);
	    if((fl2=fopen(name1,"w"))==NULL)
	      {
		perror("While file was rewriting, there were some errors");
		cout<<"\n Repeat enter file name (y/n) \n >";
		cin>>r;
	      };
	  };
	buf1=' ';
	if(r=='y')
	  {
	    fl1=fopen(name,"r");
	    cout<<"\n\n***Saved file :: "<<name1<<"***\n\n";
	    while(buf1!=EOF)
	    {
	      if(buf2!=(buf1=getc(fl1)))
	      {
		cout<<buf1;
		putc(buf1,fl2);
	      }
	      else
	      {
		cout<<"\n";
		putc('\n',fl2);
	      }

	    };
	    fl1=mfclose(fl1);
	    fl2=mfclose(fl2);
	  };
      };
    cout<<"\n>>EOF \n\nRepeat start of program (y/n) \n >";
    cin>>r;
    if(r!='y') return 0;
  };
  return 0;
};