Someone please help me with this

/* I'm in computer programming 1b. so the libraries and styles maybe noobish, but i am having trouble with expanding the array to keep the inventory expanding...so it prints out all the albums when print is called and keeps them all in memory...i need to know placement of the arrays */

Code:

#include <iostream.h>
#include <lvp\string.h>
#include  <lvp\vector.h>



struct rec{

	long sku;
	String artist;
	String album;
	long quantity;
	double price;
};//end struct

struct inv{
	inv();//constructer
	vector<rec>album;
};

inv::inv()
:album(0)

{}

/////////////////////////////////////////////////////////////////	
void read(rec&rec);//reads in records at start
void printer(rec&rec);//prints records
void add(rec&rec);//adds records to inventory
void del(rec&rec);//deleted records in inventory
void sell(rec&rec);//sells available inventory

int main(){
	rec rec;
	inv inv;
	char answer;//answer for adding a new record at start
	int menu_answer;//answer for menu
	cout<<"\t\t\tThis Register Open"<<endl<<endl;
	do{	
		cout<<"Would you like to add a new record to inventory(y/n)? ";
		cin>>answer;
		if((answer=='y'||answer=='Y')){
			read(rec);
		}//end if
		else{
			break;
		}//end else

		
		

	}while((answer!='N')||(answer!='n'));
	system("cls");

	
	do{
	cout<<"Dj Mega Emporium"<<endl;
	cout<<"\tMain Menu"<<endl<<endl;
	cout<<"1)\tSell a record."<<endl;
	cout<<"2)\tAdd a record."<<endl;
	cout<<"3)\tDelete a record."<<endl;
	cout<<"4)\tPrint record inventory report."<<endl;
	cout<<"5)\tExit"<<endl<<endl;
	cin>>menu_answer;
	system("cls");
	

	if(menu_answer==4){
		printer(rec);
		cout<<endl;
	}//end if

	else if(menu_answer==2){
		add(rec);
		cout<<endl;
	}//end else if

	else if(menu_answer==3){
		del(rec);
		cout<<endl;
	}//end else if
	
	else if(menu_answer==1){
		sell(rec);
		cout<<endl;
	}//end else if
	else if(menu_answer==5){
		cout<<"k bye"<<endl;return 0;
	}//end else if
	else{
		cout<<"Please choose a correct option"<<endl<<endl;
	}//end else

	}while(menu_answer!=5);//end do while
	system("cls");
	cout<<"k bye dont come back"<<endl;
	return 0;
	
}//end main

void read(rec&rec){//reads in record data
	cout<<"Enter the Sku Number: ";
	cin>>rec.sku;
	cout<<"Enter the Artist: ";
	cin>>rec.artist;
	cin.ignore(100, '\n');
	cout<<"Enter the Album: ";
	getline(cin,rec.album);
	cout<<"Enter the Quantity: ";
	cin>>rec.quantity;
	cout<<"Enter the price: ";
	cin>>rec.price;
	cout<<endl<<endl;
	cout<<"Record Added to Inventory"<<endl<<endl;
	

	return;
}//ends function

void printer(rec&rec){


	cout<<"Sku #: "<<rec.sku<<endl;
	cout<<"Artist: "<<rec.artist<<endl;
	cout<<"Album: "<<rec.album<<endl;
	cout<<"Quantity: "<<rec.quantity<<endl;
	cout<<"Price: "<<rec.price<<endl;
	return;
}//ends function

void add(rec&rec){
	int adding;
	cout<<"Please enter the sku number of the record you are adding ";
	cin>>rec.sku;
	cout<<endl;
	cout<<"We already have "<<rec.quantity<<" copies of "<<rec.artist<<"-"<<rec.album<<" in our inventory"<<endl;
	cout<<"How many would you like to add? ";
	cin>>adding;
	rec.quantity=rec.quantity+adding;
}//ends function

void del(rec&rec){
	cout<<"Enter the sku number of the record to delete :";
	cin>>rec.sku;
	cout<<rec.artist<<"-"<<rec.album<<" has been deleted";

}	//ends function

void sell (rec&rec){
	int purchasing;
	do{
	cout<<"Please enter the sku number of the record you are buying: "<<endl;
	cin>>rec.sku;
	cout<<endl;
	cout<<"Please enter how many books you wish to purchase: "<<endl;
	cin>>purchasing;
	if(purchasing>rec.quantity){
		cout<<"Please choose a smaller amount"<<endl<<endl;
	}//end if
	}while(purchasing>rec.quantity);//end do while
	rec.quantity=rec.quantity-purchasing;
}//ends function

Code:

}while((answer!='N')||(answer!='n'));

That is always true. Most likely you meant &&. Better yet, you could use

Code:

#include <cctype>

} while(std::tolower(answer) != 'n');

Also, using iostream.h is a bad idea. Search the board to find out why. It's better to use the standard <iostream> and add

Code:

using namespace std;

or std:: before every function call or a using directive for each identifier.

Talk about long lines. Code tags don't wrap, so don't put extra long code in them. And you can put text outside code tags as well.

i would if i could, but i have to use the assignment rules, and school supplied libraries...so yea... all im asking for is an array

i would if i could, but i have to use the assignment rules, and school supplied libraries...so yea... all im asking for is an array

<iostream> is likely supplied. By the way, what is your school?

Originally Posted by laserlight

<iostream> is likely supplied. By the way, what is your school?

wootton high school

Since you have included <lvp/vector.h>, you are probably supposed to use it to store your data? What exactly is the problem?

[rant]
Why on earth do they force you to use some third-party libraries instead of standard stuff? The vector class I downloaded looks like this (unless this is some ancient version - the first one on their list - this is pretty bad):

Code:

template <class itemType>
class vector
{
  public:

  // constructors/destructor
	 vector( );                        // default constructor (size==0)
	 explicit vector( int size );      // initial size of vector is size
	 vector( int size, const itemType & fillValue ); // all entries == fillValue
	 vector( const vector & vec );   // copy constructor
	 ~vector( );                       // destructor

  // assignment
    const vector & operator = ( const vector & vec );

  // accessors
    int  length( ) const;                   // capacity of vector

  // indexing
    itemType &       operator [ ] ( int index );       // indexing with range checking
    const itemType & operator [ ] ( int index ) const; // indexing with range checking

  // modifiers
    void resize( int newSize );             // change size dynamically;
                                            // can result in losing values
  private:

    int  mySize;                            // # elements in array
    itemType * myList;                      // array used for storage
};

So,
1) no push_back member. To add an item you'll need to check length(), resize() as needed, and finally insert the element with operator[];
2) no iterators;
3) capacity == size ? If you don't know the size beforehand, adding new elements is either going to be extremely inefficient, or you'll need to implement the resizing strategy yourself. Also, if you want to reserve some more space just in case, you'll need to manage a variable showing how many valid elements you have yourself.
etc, etc

In short, this is (barely) good as a student implementation of a dynamic container, but it is no good for any practical purpose.
Standard <vector> (among with all other standard stuff) should come with the compiler, so there's no cost. Are you really using this Lawrenceville stuff only because this is the only study material available and you have no idea how to do the exercises (if there are any) using standard libraries.
[/rant]

i need to know where to put the array code and exactly what to store