Программа написана в Dev-C++ 5.7.1., при запуске в Borland C++ ругается на bool и всё, что с ним связано. Что делать? Нужно, чтоб работала именно в Borland C++

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>

void Create();
void Display();
void Append();
void Edit();
void Delete();
bool Exist();

struct goods{char name[16]; float price; int quantity; struct good *next;
struct goods *prev;} Item;
struct goods *head, *tail;

main()
{
char c;
while(1)
{
system("cls");
printf("n *DOUBLE-LINKED LIST*nn");

puts("Press 1 to create list");
puts("Press 2 to display list");
puts("Press 3 to append item");
puts("Press 4 to edit list");
puts("Press 0 to exit");
printf("nSelect a command: ");
c=getch();

switch(c)
{
case '1': Create(); break;
case '2': Display(); break;
case '3': Append(); break;
case '4': Edit(); break;
case '0': Delete(); return 0;
default:
printf("nnIrrelevant command!n");
system("pause");
}
}
}


void Create()
{
system("cls");
if (Exist())
{
printf("The list has already been created!n");
system("pause");
return;
}
struct goods *cur, *p;
printf("Enter goods information:nn");
p=NULL;
do
{
cur=(goods *)malloc(sizeof(goods));
printf("Item: ");
scanf("%s",cur->name);
printf("Price: ");
scanf("%f", &cur->price);
printf("Quantity: ");
scanf("%d", &cur->quantity);
cur->prev=p;
if (p !=NULL) p->next=cur;

else head=cur;
p=cur;
printf("--------------------n");
printf("Press Esc to quit...nn");
}
while (getch() != 27);
tail=cur;
tail->next=NULL;
printf("nDone!n");
system("pause");
}


void Display()
{
if (!Exist())
{
printf("nnThe list has not been created!n");
system("pause");
return;
}
int count=0;
struct goods *cur;
system("cls");
printf("n *** GOODS LIST ***nn");
printf("---------------------------------------------n");
printf("%-3s%-16s%-16s%-16sn", "#", "Item:", "Price:", "Quantity:");
printf("---------------------------------------------n");
cur=head;

while (cur !=NULL)
{
printf("%-3d%-16s%-16.2f%-16dn", ++count, cur->name, cur->price, cur->quantity);
cur=cur->next;
}
printf("---------------------------------------------n");
system("pause");
}

void Append()
{
if (!Exist())
{
printf("nnThe list has not been created!n");
system("pause");
return;
}
struct goods *cur;
system("cls");
printf("n *** ADDING NEW ITEM ***nn");
cur=(goods *)malloc(sizeof(goods));
printf("Item: ");
scanf("%s",cur->name);
printf("Price: ");
scanf("%f", &cur->price);
printf("Quantity: ");
scanf("%d", &cur->quantity);
cur->prev=tail;
cur->next=NULL;
tail->next=cur;
tail=cur;
printf("nDone!n");
system("pause");
}


void Edit()
{
if (!Exist())
{
printf("nnThe list has not been created!n");
system("pause");
return;
}
int count=0;
float limit;
struct goods *cur, *temp;
system("cls");
cur=head;
printf("n *** EDIT MODE ***nn");
printf("Enter price: ");
scanf("%f", &limit);

while (cur !=NULL)
{
if (cur->price>limit)
{
count++;
if (cur == head)
{
if (cur->next !=NULL)
{
head=cur->next;
head->prev=NULL;
free(cur);
cur=head;
}
else
{
free(cur);
head=tail=cur=NULL;
printf("The list has been deleted!n");
}
}
else if (cur == tail)
{
tail=cur->prev;
tail->next=NULL;
free(cur);
cur=tail;
}
else
{
cur->next->prev=cur->prev;
cur->prev->next=cur->next;
temp=cur;
cur=cur->next;
free(temp);
}
}
else cur=cur->next;
}
printf("%d item(s) removed.n",count);
system("pause");
}


void Delete()
{
struct goods *cur, *temp;
cur=head;

while (cur !=NULL)
{
temp=cur;
cur=cur->next;
free(temp);
}
head=tail=NULL;
}


bool Exist()
{
if (head !=NULL) return true;
else return false;
}