Example of simple list

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

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


#define max_value 100

using namespace std;

void init_Random()
{
 srand(time(NULL));
}

typedef struct temporary_next
{
 temporary_next *next;
 int value_str;
}position;
bool is_First(int x)
{
 int i,sum;
 sum=0;
 for(i=1;i<x+1;i++)
  if(x%i==0)
   ++sum;
  if(sum==2)
   return true;
  else
   return false;
}

int *first_digit_Array;
class list_Direction
{
 private:
 typedef struct
 {
  position *start;
  position *end;
 }show;
 show info_show;
 public:
 list_Direction()
 {
  info_show.start=info_show.end=NULL;
 }
 void plus_next(int value)
 {
  position *new_pos;
  new_pos=new position;
  new_pos->value_str=value;
  new_pos->next=NULL;
  if(info_show.start==NULL)
   info_show.start=info_show.end=new_pos;
  else
   {
    (info_show.end)->next=new_pos;
    info_show.end=new_pos;
   }

 }
 list_Direction&  operator --()
 {
  if(info_show.start==info_show.end)
  {
   delete info_show.start;
   info_show.start=info_show.end=NULL;

  }
  else
  {
   position *temp_position=info_show.start;
   while((temp_position->next)!=info_show.end)
    info_show.end=temp_position;
   delete temp_position->next;
   temp_position->next=NULL;
  }
  return (*this);
 }
 list_Direction friend& operator +(list_Direction &A, list_Direction &B)
 {
  list_Direction *temp_List=new list_Direction;
  position *C=(A.info_show).start;
  position *D=(B.info_show).start;
  do
  {
   temp_List->plus_next(C->value_str);
   C=C->next;
  }while(C!=NULL);
  do
  {
   temp_List->plus_next(D->value_str);
   D=D->next;
  }while(D!=NULL);
  return (*temp_List);
 }
 bool is_Empty()
 {
  if(info_show.start==NULL)
   return true;
  else
   return false;

 }
 void write_Elements()
 {
  position *temp_pos=info_show.start;
  while(temp_pos!=NULL)
  {
    printf("%d  ",temp_pos->value_str);
    temp_pos=temp_pos->next;
    printf("\n");
  }
  printf("\n");
 }

 ~list_Direction()
 {
  while(!is_Empty())
   (*this)--;
   ;
 }

};
int main(int argc, char* argv[])
{
  first_digit_Array=new int[max_value];
  int i,j;
  i=0;
  j=2;
  do
  {
   if(is_First(j))
   {
    first_digit_Array[i]=j;
    ++i;
   }
   ++j;
  }while(i<max_value);
  list_Direction X,Y,Z;
  for(i=0;i<max_value;i++)
  {
   X.plus_next(first_digit_Array[rand()%max_value]);
   Y.plus_next(first_digit_Array[rand()%max_value]);
  }
  Z=X+Y;
  Z.write_Elements();

  delete first_digit_Array;
 getch();
        return 0;
}