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

void fibo(int *);
void fact(int *);
void rev(char *);

void main()
{
   void input(void);
   clrscr();
   input();
//   fibo(n);
   getch();
}

void input(void)
{
     FILE *fp;
     int i,*no,ctr;
     char * str,choice;

     fp=fopen("input1.txt","w");
     ctr=0;
     while(1)
      {
       printf("\n DO YOU WANT TO ENTER AGAIN::");
       fflush(stdin);
       scanf("%c",&choice);
       if(choice=='y')
       {
        printf("\n ENTER THE NO FOR FIBONACCII AND FACTORIAL::");
        scanf("%d",no);
        printf("\n ENTER THE STRING FOR REVESE::");
        scanf("%s",str);
        fprintf(fp,"%d %s\n",*no,str);
        ctr++;
        }
       elsebreak;
      }
     fclose(fp);
     fp=fopen("input1.txt","r");
     for(i=1;i<=ctr;i++)
     {
    fscanf(fp,"%d %s",no,str);
    fibo(no);
    fact(no);
    rev(str);
       //    printf("\nfrom file %d %s",*no,str);
    }
    fclose(fp);
}

void fibo(int * n)
{
   FILE * fout;
   int fibonaccii(int*,int*,int*,int *,FILE *);
   int fno1=0,sno1=1,*fno,*sno,*tno;
   fno=&fno1;
   sno=&sno1;
   fout=fopen("output1.txt","a");
   fprintf(fout,"\n FIBONACII SERICE OF %d",*n);
   fprintf(fout,"\n%d\t%d",*fno,*sno);
   fibonaccii(fno,sno,tno,n,fout);
   fclose(fout);
}

int fibonaccii(int *fno,int *sno,int *tno,int * n,FILE * fout)
{
    *tno=*fno+*sno;
    *fno=*sno;
    *sno=*tno;
    if(*tno>*n)
      return(0);
    else
    {
      fprintf(fout,"\t%d",*tno);
      fibonaccii(fno,sno,tno,n,fout);
    }
    return(0);
}

void fact(int * no1)
{
   FILE * fout;
   int factorial(int *,int,int *,FILE *);
   int ctr1=1,*ctr,no;
   ctr=&ctr1;
   fout=fopen("output1.txt","a");
   fprintf(fout,"\n FACTORIAL OF %d",*no1);
   fprintf(fout,"\n%d",*ctr);
   ctr1++;
   ctr=&ctr1;
   no=*no1;
   factorial(no1,no,ctr,fout);
//   fprintf(fout,"\n%d",*no1);
   fclose(fout);
}

int factorial(int * no1,int no,int * ctr,FILE * fout)
{
       if(no%*ctr==0)
    {
       fprintf(fout,"\t%d",*ctr);
       no=no / *ctr;
       factorial(no1,no,ctr,fout);
    }
    else
    {
       *ctr=*ctr+1;
     if(no<=1)
      {
        fprintf(fout,"\t%d",*no1);
        return(0);
      }
       factorial(no1,no,ctr,fout);
    }
}


void rev(char * str)
{
   FILE * fout;
   int *ctr;
   int reverse1(int * ,char *,FILE *);
   fout=fopen("output1.txt","a");
   fprintf(fout,"\n REVERSE OF %s IS::",str);
   *ctr=strlen(str);
   reverse1(ctr,str,fout);
   fclose(fout);
}

int reverse1(int * ctr,char * str,FILE * fout)
{
   char * rev=str+*ctr-1;

   if(*ctr!=0)
   {
      fprintf(fout,"%c",*rev);
      *ctr=*ctr-1;
      reverse1(ctr,str,fout);
   }
   elsereturn(0);
}

**************************INPUT*************************************
5 jolly




**************************OUTPUT*************************************
 FIBONACII SERICE OF 5
0    1    1    2    3    5
 FACTORIAL OF 5
1    5    
 REVERSE OF jolly IS::ylloj