SQL with Manoj

Q10. Program to work with Purchase Order Problem:

Solve the following purchase order problem:
– Item list entry
– Bill generation
– Modify Item quantity purchased
– Remove Item from the list

… from College notes (BCA/MCA assignments):

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

class CBills{
	private:
		char name[20];
		int qty;
		float price, net;
	public:
		void Getinfo();
		void Modify(CBills *, int );
		void Remove(CBills *, int &);
		void Display() const;
		};

void CBills :: Getinfo(){
	cout<<"\n Enter Item Name: ";
	cin>>name;
	cout<<"\n Enter Item Price: ";
	cin>>price;
	cout<<"\n Enter Item Quantity: ";
	cin>>qty;
	net = price * qty;
	}

void CBills :: Modify(CBills *order, int no){
	char key[15];
	cout<<"\n Enter the Item Name to Modify: ";
	cin>>key;
	for(int i=0; i<=no; i++){
		if(strcmp(order[i].name, key) == 0)
			break;
		}
	cout<<"\n Enter Item Name: ";
	cin>>order[i].name;
	cout<<"\n Enter Item Price: ";
	cin>>order[i].price;
	cout<<"\n Enter Item Quantity: ";
	cin>>order[i].qty;
	order[i].net = order[i].price * order[i].qty;
	}

void CBills :: Remove(CBills *order, int &no){
	char key[15];
	cout<<"\n Enter the Item Name to Remove: ";
	cin>>key;
	for(int i=0; i<=no; i++){
		if(strcmp(order[i].name, key) == 0)
			break;
		}
	for(int j=i; j<=no; j++)
		order[j] = order[j+1];
	no--;
	}

void CBills :: Display() const{
	cout<<"\n\t Item Name:  "<<name;
	cout<<"\n\t Item Price: "<<price;
	cout<<"\n\t Item Quantity: "<<qty;
	cout<<"\n\t Net Price: "<<net;
	}

void main(){
	CBills bills[20], bl;
	int ch1, item_no = -1;
	char ch2;
	while(1){
		clrscr();
		cout<<"\n Inventory and Purchase Order Managament.";
		cout<<"\n ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~";
cout<<"\n 1 -> Get Item Details.";
		cout<<"\n 2 -> Display Items.";
		cout<<"\n 3 -> Modify an Item.";
		cout<<"\n 4 -> Remove an Item.";
		cout<<"\n 5 -> Exit.";
		cout<<"\n Enter your choice: ";
		cin>>ch1;
		switch(ch1){
			case 1: // Getinfo.
				while(1){
					clrscr();
					item_no++;
					cout<<"\n Entry of Purchased Items.";
					cout<<"\n ~~~~~~~~~~~~~~~~~~~~~~~~~";
					cout<<"\n Item No. "<<item_no+1;
					bills[item_no].Getinfo();
					cout<<"\n Do you want to add more 
  (y/n): ";
					cin>>ch2;
					if(ch2 == 'n')
						break;
					}
				break;
			case 2: // Display.
				clrscr();
				cout<<"\n Purchase Order Details.";
				cout<<"\n ~~~~~~~~~~~~~~~~~~~~~~~";						for(int i=0; i<=item_no; i++){
					cout<<"\n\n Item No.: "<<i+1;
					bills[i].Display();
					}
				break;
			case 3: // Modify.
				bl.Modify(bills, item_no);
				cout<<"\n\n Record Modified.";
				break;
			case 4: // Remove.
				bl.Remove(bills, item_no);
				cout<<"\n\n Record Removed.";
				break;
			default:
				exit(1);
			} // end of switch.
		getch();
		} // end of while.
	} // end of main.

Output:

Inventory and Purchase Order Managament.
1 -> Get Item Details.
2 -> Display Items.
3 -> Modify an Item.
4 -> Remove an Item.
5 -> Exit.
Enter your choice: 1

Entry of Purchased Items.

Item No. 1
Enter Item Name: Magazine

Enter Item Price: 100

Enter Item Quantity: 5

Do you want to add more (y/n): y

Entry of Purchased Items.

Item No. 2
Enter Item Name: Register

Enter Item Price: 50

Enter Item Quantity: 10

Do you want to add more (y/n): y

Entry of Purchased Items.

Item No. 3
Enter Item Name: Pen

Enter Item Price: 10

Enter Item Quantity: 20

Do you want to add more (y/n): n

Purchase Order Details.
Item No.	Name		Price		Qty		Net Price
    1		Magazine	100		5		500
    2		Register	50		10		500
    3		Pen		10		20		200