#include "TString.h"

//   ========================================================
//   ========================================================
//   *          simple routine to convert integer to character
//   ********************************************************

TH1F* h(int val,TFile &fx)
{
char* num=ConvertInteger(val);
TString nums(num);
TString name="h" + nums ;
TH1F* hxx=(TH1F*) fx.Get(name);
return hxx;
}

char* ConvertInteger(int val){
	char c[30];  //temporaty character
	int count=0;
// check positive
	if (val < 0) val = -val;
	bool EXIT = false;
	while( EXIT == false ) {
	int digit = val- int((double)val/10.)*10;
//  choose character
	switch(digit) {
	case 0: c[count]= '0'; break;
	case 1: c[count]= '1'; break;
	case 2: c[count]= '2'; break;
	case 3: c[count]= '3'; break;
	case 4: c[count]= '4'; break;
	case 5: c[count]= '5'; break;
	case 6: c[count]= '6'; break;
	case 7: c[count]= '7'; break;
	case 8: c[count]= '8'; break;
	case 9: c[count]= '9'; break;
	}
	count++;
	val = val/10;
	if(val == 0) EXIT = true;
	}
	char* res = new char[count];
// sort characters int the right direction
	for( int i=0; i < count; i++){
		*(res + count-i-1) = c[i];
	}
	*(res + count)= '\0';   // C-string

	return res;
}

//   ========================================================
//   ========================================================
//   *          simple routine to convert double to character
//   ********************************************************

char* ConvertDouble(double val, int precision){

//special case
	if (val == 0.) return ConvertInteger(0);
//------ check sign ----------------------------------------
	char* res = new char[20];
  res[0] = '\0';   // initial initializtion
	if (val < 0.) {
      char sign[3] = "-";      strcpy(res,sign);
      val *= -1.;
  }

  int digit_left = (int)(val);
  char* int_part_nosign = ConvertInteger(digit_left);
  strcat(res, int_part_nosign);

//------ define right part -------------------------
  double val_right = val - digit_left;
  if(val_right == 0.) return res;   // pure integer double

  char* dot = ".";   strcat(res, dot);
	bool EXIT = false;
  int count = 0;
	while( EXIT == false ) {
  if((val_right == (int)(val_right)) || (count == precision)) EXIT = true;
  else val_right *=10.;
  count++;
  }
  int val_right_int = (int) (val_right);
  char* dec_part = ConvertInteger(val_right_int);
  strcat(res, dec_part);
  return res;
}