Code

-------Practical1.cpp-------

#include "lib.h"
#include "product.h"
#include <iostream>
using namespace std;

int main ()//Main Program
{
	int selection = 0;
	int productnumber=0;
	int count2 =0;
	funct function;

	do{
		cout << endl;
		cout << "Enter a menu aoption" << endl;
		cout << "1 = Add new item" << endl;
		cout << "2 = Print items" << endl;
		cout << "3 = Find a price" << endl;
		cout << "4 = Sort by ID" << endl;
		cout << "5 = Delete by ID" << endl;
		cout << "6 = Find the Lowest Price" << endl;
		cout << "7 = Exit" << endl << endl;;
		cin >> selection;

		if(selection==1)
		{
			cout << "Enter the the new ID" << endl;
			cin >> products[count2].id;
			cout << "Enter the the new price" << endl;
			cin >> products[count2].price;
			count2++;
		}
		else if(selection==2)
		{
			int count =0;
			cout <<"ID PRICE";
			cout <<"" << endl;
			while(count<count2)
			{
				cout <<products[count].id;
				cout <<" ";
				cout <<products[count].price << endl;
				count++;
			}
		}
		else if(selection==3)
		{
			int pricematch = function.GetPrice();
		}
		else if(selection==4)
		{
			cout <<"Sorting by ID" << endl;
			function.Sort(count2);
			cout <<"Sorted!" << endl;
		}
		else if(selection==5)
		{
			int selection=0;
			cout <<"Please select an Id to delete" << endl;
			cin >> selection;
			function.SetToZero(selection,count2);
			count2--;

		}
		else if(selection==6)
		{
			unsigned int lowestprice = function.FindLowest(count2);
			cout << "lowest price is" << endl;
			cout << "ID Price" << endl;
			cout << products[lowestprice].id << " " << products[lowestprice].price;
		}
	}
	while(selection!=7);
	return 0;
}

--------lib.cpp------

#include <iostream>
using namespace std;
#include "lib.h"
#include "product.h"

unsigned int funct::GetPrice()
{

	int productchoice=0;
	int tempvaule=0;
	cout << "Please enter in a ID" << endl;
	cin >> productchoice;
	cout << "your price for that item is" << endl;
	cin >> products[productchoice].price;
	tempvaule=products[productchoice].price;
    return tempvaule;
}

void funct::Sort(int count2)
{
	int i,j;
    for(i=0;i<count2;i++)
    {
        for(j=0;j<i;j++)
        {
			if(products[i].id<products[j].id)
            {
                int temp=products[i].id; //swap
				int temp1=products[i].price;
				products[i].id=products[j].id;
				products[i].price=products[j].price;
                products[j].id=temp;
				products[j].price=temp1;
            }
        }
    }
}
void funct::SetToZero(int selection,int count2)
{
	selection--;
	products[selection].id=0;
	products[selection].price=0;
	int i = selection;
	int j = i;
		while (i<count2)
		{
			if (products[i].id == 0)
				{
				j++;
				int temp = products[j].id;
				int temp1 = products[j].price;
				products[i].id = temp;
				products[i].price = temp1;
				products[j].id = 0;
				products[j].price = 0;
				}
			i++;
		}
}
unsigned int funct::FindLowest(int count2)
{
	int i;
	int counter=0;
	unsigned int tempprice=100;
	for(i=0;i<count2;i++)
	{
		if(products[i].price<tempprice)
		{
			tempprice=i;
		}
	}
	return tempprice;
}

-------product.h-----------

#pragma once
class product//struct to hold products
{
public:
	int id;//ID FOR EACH PRODUCT
	unsigned int price;//price for each product
}products[10];


-----lib.h----

#pragma once
#include "product.h"
class funct
{
public:
	unsigned int GetPrice();//Function to get a price from an ID
	void Sort(int count2);//Sorts by ID
	void SetToZero(int selection, int count2);//Sets price and ID to zero
	unsigned int FindLowest(int count2);//Finds the ID and price of the lowest price
};