#include<stdio.h>

int main()
{
  printf("Enter the number: ");
  char ch = getchar();
  int isNegative = 0,gotDecimal = 0;int integerPart = 0,floatPart = 0,div1 = 1,div =1;
  
  while( (ch >= '0' && ch <= '9') || ch == '.' || ch == '-' )
  {
    if(ch == '-')
    {
      isNegative = 1;
    }
    else
    {
      if(ch != '.')
      {
	if(gotDecimal == 0)
	{
	  
	  integerPart = integerPart *10 + (ch - '0');
	  //printf("digit before decimal : %d  NUmber : %f \n",(ch - '0') , integerPart);
	  div1 = div1 *10;
	} 
	if(gotDecimal == 1)
	{
	  //printf("digit after decimal : %d\n",(ch - '0'));
	  floatPart = floatPart *10 + (ch - '0');
	  //printf("digit after decimal : %d  NUmber : %f \n",(ch - '0') , floatPart);
	  div = div *10;
	}
      }
      if(ch == '.')
      {
	gotDecimal = 1;
      }
    }
    ch = getchar();
  }
  //div1 = div1 /10;div =div/10;
  printf("The number is intergerPart : %d floatPart : %d\n",integerPart,floatPart);
  floatPart = floatPart * 2;
  if(floatPart > div)
  {
    integerPart = integerPart * 2 + 1; 
    floatPart = floatPart - div;
  }
  else
  {
    integerPart = integerPart * 2 ;
  }
  div = div /10;
  if(integerPart < div1)
    div1 = div1/10;
 
  printf("Twice the number: intergerPart : %d floatPart : %d\n",integerPart,floatPart);
  printf("Now printing twice the input number using putchar: ");
  if(isNegative == 1)
    putchar('-');
  
  int n = integerPart;
  while( n > 0)
  {
    int digit = n / div1;
    n = n % div1;
    div1 = div1 /10;
    putchar(digit + '0');
  }
  if(gotDecimal == 1)
  {
    putchar('.');
    n = floatPart;
    while( n > 0)
    {
      int digit = n / div;
      n = n % div;
      div = div /10;
      putchar(digit + '0');
    }
  }
  printf("\n");
  return 0;
}