Question

Use linked list and write in C++

Food ordering system

1. Place Order
2. View the food details
3. Modify food details
4. Delete food details

Order should let the customer to enter the food code, flavor, weight(kg), unit price, qty, customerID, name, address and contact number. It will also have an order id automatically assigned with a unique ID when new order is added. When view the food details, it should also calculate the unit price * qty as a bill amount. You should also be able to modify all the food details and delete food details.

Answer 1

// Online C++ compiler to run C++ program online
#include <iostream>
//#include <conio>
#include <iomanip>
#include<string.h>
using namespace std;

struct food{
int order_id;
//char food_code[10],flavor[20],customer_id[20];
//char address[100],name[50];
string food_code,flavor,customer_id;
string address,name;
int weight,unit_price,qty,contact_number;
struct food *next;
};
  

class Foodsystem{
food *head,*temp,*temp2,*end;
static int id;
  
public:
Foodsystem(){ head=NULL;end=NULL;}

void Place_Order();
void View_food_details();
void Modify_food_details();
void Delete_food_details();
};
  
int Foodsystem::id=1000;
  
void Foodsystem::Place_Order(){
temp=new food;
cout<<endl;
cout<<"enter your name ::";
//getline(cin,temp->name);
cin>>temp->name;
cout<<"enter contact number::";
cin>>temp->contact_number;
cout<<"enteer address::";
getline(cin,temp->address);
cout<<"customer_id::";
getline(cin,temp->customer_id);
cout<<"enter food code u want to order::";
getline(cin,temp->food_code);
cout<<"enter flavor you want";
getline(cin,temp->flavor);
cout<<"enter the food weight in kg";
cin>>temp->weight;
cout<<"enter unit price";
cin>>temp->unit_price;
cout<<"quanity of item you want::";
cin>>temp->qty;
temp->order_id=id++;
if(head==NULL)
{head=temp;end=head;}
else
{end->next=temp;end=temp;}

}
  
void Foodsystem::View_food_details()
{
temp=head;
while(temp){
cout<<"your order id::";
cout<<temp->order_id<<endl;
cout<<"customer_id::";
cout<<temp->customer_id<<endl;
cout<<"food code::";
cout<<temp->food_code<<endl;
cout<<"flavor";
cout<<temp->flavor<<endl;
cout<<"the food weight in kg";
cout<<temp->weight<<endl;
cout<<"unit price";
cout<<temp->unit_price<<endl;
cout<<"quanity of item ::";
cout<<temp->qty<<endl;
cout<<"bill amount";
cout<<temp->unit_price *temp->qty<<endl;
temp=temp->next;
}
}
  

int main() {
// Write C++ code here
Foodsystem fs;
int choice;
while(1)
{
cout<<endl<<"1. Place Order" <<endl<<"2. View the food details"<<endl<<"3. Modify food details"<<endl<<"4. Delete food details"<<endl<<"5. exit"<<endl;
cout<<"enter your choice";
cin>>choice;
switch(choice){
case 1 : fs.Place_Order(); break;
case 2 : fs.View_food_details();break;
// case 3 : fs.Modify_food_details();break;
// case 4 : fs.Delete_food_details();break;
case 5 : exit(0);
default : cout<<"wrong choice";
  
}
}

return 0;
}