// copyright 1999 Brian J. Reithel, Ph.D.

#include <iostream.h>
#include <fstream.h>

class building {
	char BuildingName[40];
	float BuildingSqfeet;
	building* NextBuilding;  // pointer to next building in llist
public:
	float getsqfeet();
	char* getname();
	void info_in(void);
	void info_out(void);
	void setnext(building*);  // modify pointer value
	building* getnext(void);  // retrieve pointer value
};

void building::info_in(){
	char nl;
	cout << "Enter Building Name: ";
	cin.get(BuildingName,40,'\n');
	cin.get(nl);
	cout << "Enter Building Square Feet: ";
	cin >> BuildingSqfeet;
	cin.get(nl);
}

void building::info_out(){
	cout << "Building Name: " << BuildingName << endl;
	cout << "Square Feet:   " << BuildingSqfeet << endl;
}

void building::setnext(building* nextbldg){
	NextBuilding=nextbldg;
}

building* building::getnext(){
	return(NextBuilding);
}

int main(){
	building* first=NULL;  // track address of 1st bldg
	building* temp=NULL;   // temporary pointer
	building* prev=NULL;   // temporary pointer to last instance created
	char nl;
	char another;

	cout << "Do you want to enter a buildindg? (y/n) ";
	cin.get(another);
	cin.get(nl);
	while(another=='Y'||another=='y') {
		temp=new building;
		temp->info_in();
		if(first==NULL) first=temp;  // keep track of first item
		else            prev->setnext(temp);  // store address of current item in previous item
		prev=temp;
		cout << "Do you want to enter another building? (y/n) ";
		cin.get(another);
		cin.get(nl);
	}
	if(prev!=NULL) prev->setnext(NULL); // mark end of llist


	/*int c;
	int maxc;

	cout << "How many buildings do you want to enter? ";
	cin >> maxc;
	cin.get(nl);

	first=new building;  // store address of first item in llist
	first->info_in();   

	prev=first;
	for(c=1;c<maxc;c++){
		temp=new building;
		temp->info_in();
		prev->setnext(temp);  // store address of current item in the previous item
		prev=temp;
	}
	prev->setnext(NULL);  // mark the current item as the last in the llist
	*/

	/*temp=first;
	for(c=0;c<maxc;c++){
		temp->info_out();
		temp=temp->getnext();
	}*/

	temp=first;
	while(temp!=NULL) {
		temp->info_out();
		temp=temp->getnext();  // get address of next item in llist
	}

	// save linked list to disk file
	fstream outfile;
	outfile.open("buildings.dat",ios::out);
	temp=first;
	while(temp!=NULL) {
		outfile << temp->getname() << endl;
		outfile << temp->getsqfeet() << endl;
		temp=temp->getnext();  // get address of next item in llist
	}
	outfile.close();

	return(0);
}

char* building::getname()
{
	return(BuildingName);
}

float building::getsqfeet()
{
	return(BuildingSqfeet);
}