link list

Billing.cpp

@@ -0,0 +1,198 @@
+/*	Computer project on retail Billing   
+	made by				: rakesh kumar
+	Last compiled on	: 23-10-2018
+*/
+#include<fstream>
+#include<iostream>
+#include<iomanip>
+#include<string.h>
+#include<conio.h>
+using namespace std;
+void line(int n=120, char ch='-'){
+	for(int i=0;i<n;i++)
+		cout<<ch;
+}
+class item{
+	private:
+		int item_no;
+		char item_name[30];
+		float item_price;
+	public:
+		void read_data();
+		void show_data();
+		void add_item();
+		void edit_item();
+		void delete_item();
+		void report();
+		void main_menu();
+		int item_price(int tempNumber);
+		char* item_name(int tempNumber);
+};
+
+class Billing:public item{
+	private:
+		int invoice_no;
+		char customer_name[30];
+		char phone_no[20];
+		float amount;
+	public:
+		void input_data();
+		void save_info();
+		void report();
+};
+
+void Billing::input_data(){
+	int titem_no;
+	float amount=0;
+	cout<<"Invoice No:";
+	cin>>invoice_no;
+	cout<<"Customer Name :";
+	fflush(stdin);
+	cin.getline(customer_name,30);
+	cout<<"Phone No:";
+	fflush(stdin);
+	cin.getline(phone_no);
+	do{
+		cout<<"Item No:";
+		cin>>titem_no;
+		name = item_name(titem_no);
+		cout<<"Name :"<<name;
+		price = item_price(item_no);
+		cout<<"Price :"<<name;
+		cout<<Price;
+		cout<<"Qty :";
+		cin>>qty;
+		amount += price*qty;
+		cout<<"Total Payable amount :"<<amount;
+	}while(titem_no!=0);
+	return;
+}
+
+void item::read_data(){
+	cout<<"Item No :";
+	cin>>item_no;
+	cout<<"Item Name :";
+	fflush(stdin);
+	cin.getline(item_name,30);
+	cout<<"Item Price :";
+	fflush(stdin);
+	cin>>item_price;
+}
+
+void item::show_data(){
+	cout<<"Item No :"<<item_no;
+	cout<<"item Name :"<<item_name;
+	cout<<"item Price :"<<item_price;
+}
+
+void item::add_item(){
+	ofstream fout;
+	fout.open("item.dat",ios::app|ios::binary);
+	read_data();
+	fout.write((char*)this,sizeof(item));
+	fout.close();
+}
+
+void item::delete_item(){
+	int titem_no;
+	ifstream fin;
+	ofstream fout;
+	system("cls");
+	cout<<"\n\t\t Delete Item Screen\n";
+	cout<<"Item No :";
+	cin>>titem_no;
+
+	fin.open("item.dat",ios::in|ios::binary);
+	fout.open("temp.dat",ios::out|ios::binary);
+	while(fin.read((char*)this,sizeof(item)))
+	  {
+	  	if(item_no!=titem_no)
+	  		fout.write((char*)this,sizeof(item));
+	  }
+	fin.close();
+	fout.close();
+	remove("item.dat");
+	rename("temp.dat","item.dat");
+}
+
+void item::edit_item(){
+	int titem_no;
+	ifstream fin;
+	ofstream fout;
+	system("cls");
+	cout<<"\n\t\t Edit Item Screen\n";
+	cout<<"Item No :";
+	cin>>titem_no;
+
+	fin.open("item.dat",ios::in|ios::binary);
+	fout.open("temp.dat",ios::out|ios::binary);
+	while(fin.read((char*)this,sizeof(item)))
+	  {
+	  	if(item_no==titem_no)
+	  		read_data();
+		fout.write((char*)this,sizeof(item));
+	  }
+	fin.close();
+	fout.close();
+	remove("item.dat");
+	rename("temp.dat","item.dat");
+}
+
+void item::report(){
+	ifstream fin;
+	fin.open("item.dat",ios::in|ios::binary);
+	system("cls");
+	cout<<"\n\t\t\t\t\t\t List of Items\n\n";
+	line();
+	cout<<"S.NO\t\t\tItem No\t\t\t Item Name \t\t\t Price\n";
+	line();
+	int i=1;
+	while(fin.read((char*)this,sizeof(item)))
+		{
+			cout<<i++<<"\t\t\t"<<item_no<<"\t\t\t"<<item_name<<"\t\t\t\t "<<item_price<<endl;
+		}
+	line();
+	fin.close();
+	getch();
+}
+
+void item::main_menu(){
+	int choice;
+	do{
+		system("cls");
+		cout<<"\n\t\t\t ITEM MENU";
+		cout<<"\n\t\t\t\t1.	Add Item";
+		cout<<"\n\t\t\t\t2.	Delete Item";
+		cout<<"\n\t\t\t\t3.	Edit Item";
+		cout<<"\n\t\t\t\t4.	Report";
+		cout<<"\n\t\t\t\t5.	Exit";
+		cout<<"\n\t\t\t\t	Enter your choice(1..5) :";
+		cin>>choice;
+		switch(choice)
+		 {
+		 	case 1:
+		 			add_item();
+		 			break;
+		 	case 2:
+		 			delete_item();
+		 			break;
+		 	case 3:
+		 			edit_item();
+		 			break;
+		 	case 4:
+		 			report();
+		 			break;
+		 	case 5:
+		 			break;
+		 	default:
+		 			cout<<"\n\n Wrong choice...Try again";
+		 			getch();
+		 }
+	}while(choice!=5);
+}
+
+int main(){
+	item A;
+	A.main_menu();
+	return 0;
+}

linklist.cpp

@@ -0,0 +1,134 @@
+/*	Program to display list list functionality
+	made by		: rakesh kumar
+*/
+#include<iostream>
+#include<conio.h>
+using namespace std;
+struct node{
+	int data;
+	node *ptr;
+};
+
+class linklist{
+		node *x,*y,*temp;
+	public:
+		linklist(){
+			x=NULL;
+		}
+		void add_node_begin();
+		void add_node_end();
+		void delete_begin();
+		void show_data();
+};		
+
+void linklist::add_node_begin(){
+	if(x==NULL)
+	  {
+	  	x = new(node);
+	  	cout<<"Enter value :";
+	  	cin>>x->data;
+	  	x->ptr=NULL;
+	  }
+	else
+		{
+			temp = new(node);
+			cout<<"Enter value :";
+			cin>>temp->data;
+			temp->ptr=x;
+			x= temp;
+		}
+	return;
+}
+
+void linklist::add_node_end(){
+	if(x==NULL)
+		{
+			x= new(node);
+			cout<<"Enter value :";
+			cin>>x->data;
+			x->ptr= NULL;
+		}
+	else
+		{
+			y = x;
+			while(y->ptr!=NULL)
+				y = y->ptr;
+			y->ptr = new(node);
+			y = y->ptr;
+			cout<<"Enter value :";
+			cin>>y->data;
+			y->ptr =NULL;
+		}
+	return;
+}
+
+void linklist::delete_begin(){
+	if(x==NULL)
+		{
+			cout<<"Link list empty";
+			getch();
+		}
+	else
+		{
+			temp = x;
+			x= x->ptr;
+			delete(temp);
+		}
+	return;
+}
+
+void linklist::show_data()
+{
+	if(x==NULL)
+		{
+			cout<<"Link list empty";
+			getch();
+		}
+	else
+		{
+			y = x;
+			while(y!=NULL)
+				{
+					cout<<y->data<<"\t";
+					y = y->ptr;
+				}
+			getch();
+		}
+	return;
+}
+
+int main(){
+	linklist l;
+	int choice;
+
+	do{
+		system("cls");
+		cout<<"\n\n\t\t\t LINK LIST MENU";
+		cout<<"\n\n\n\t\t1.	Add at begining";
+		cout<<"\n\n\n\t\t2.	Add at end";
+		cout<<"\n\n\n\t\t3.	Delete from beginging";
+		cout<<"\n\n\n\t\t4.	Show contents";
+		cout<<"\n\n\n\t\t5.	Exit";
+		cout<<"\n\n\n\n\t\t\t Enter your choice (1..5) :";
+		cin>>choice;
+		switch(choice)
+		{
+			case 1:		l.add_node_begin();
+						break;
+			case 2:
+						l.add_node_end();
+						break;
+			case 3:
+						l.delete_begin();
+						break;
+			case 4:
+						l.show_data();
+						break;
+			case 5:
+						break;
+			default:
+						cout<<"\n\n Wrong choice...Try again";
+		}
+	}while(choice!=5);
+	return 0;
+}