Question

C++ please

Let's pretend that we can still go out to eat at a restaurant. Suppose we have the job to make a program that accepts a dinner reservation. The information collected will be the name of the customer, the date for the reservation, the time for the reservation (good choice for a hierarchical struct), the number in the party, email address (for updates) and phone number. Define a hierarchical structure for a dinner reservation that will contain the above information. Using that structure declare variables for at least two dinner reservations. Write a program that accepts data, populates the variables and prints out the data for at least two reservations. You can modify the functions from this module to read the data and print the data. (NOTE: Editing the program we just did should make this pretty easy.)

Here are the functions and code from the module:

//  
// Examples of hierarchical structures and functions
//

#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>

using namespace std;

1. Define the structure for date. It has to be defined prior to the structure that uses it.

struct date
{
        unsigned int month;
        unsigned int day;
        unsigned int year;
};

2. We will now make a modified version of the student_record structure by adding
a member for the birthdate. (I have also removed the enumeration type from the struct
and changed the type for exam and homework to double.) The birthdate can be inserted at
any location within student_record. Remember that the order of struct members does not matter.
Here is the modified student_record.

struct student_record
        {
                string firstname;
                string lastname;
                date birthdate;
                float gpa;
                double exam;
                double homework;
                float grade;
        };

// Function Prototypes go Here

int main(void) 
{

3. Declare some variables of type student_record. Let's use Alice and Bob again. Notice
that we cannot initialize these variables right now since they continue multiple items of
different types.

   // Variables of type student record
   student_record Alice, Bob;

4. Let's populate the members of Alice by typing in the data. The names are easily
entered just as in our previous example.

   cout << "Enter Student Data for Alice." << endl;
   cout << "First Name " << endl;
   cin >> Alice.firstname;

   cout << "Last Name " << endl; 
   cin >> Alice.lastname;

5. Now for birthdate. How do we handle the hierarchical structure? We have to use another dot.

   cout << "Enter birthdate as MM DD YYYY " << endl;
   cin >> Alice.birthdate.month >> Alice.birthdate.day >> Alice.birthdate.year;

6. When the birthdate is entered we have to access each of the three members (month, day
and year) individually. First we get Alice's birthdate using one dot (Alice.birthdate) . 
In order to "drill down" to the individual parts of the birthdate we have to use an
additional dot (Alice.birthdate.month).

7. Now let's fill out the remaining data for Alice.

   cout << "Enter gpa " << endl;
   cin >> Alice.gpa;

   cout << "Enter exam average " << endl;
   cin >> Alice.exam;

   cout << "Enter homework average " << Alice.homework;
   cin >> Alice.homework;

8. Compute Alice's numeric grade from exam and average

   Alice.grade = Alice.exam * 0.8 + Alice.homework * 0.2;

9. Finally let's print out all of Alice's data.

   cout << endl;
   cout << "Data Record for Alice " << endl;
   cout << Alice.firstname << "  " << Alice.lastname << endl;
   cout << "Birthdate: " << Alice.birthdate.month
        << setw(3) << Alice.birthdate.day 
        << setw(5) << Alice.birthdate.year << endl;
   cout << fixed << setprecision(1);
   cout << "Grade Point Average " << Alice.gpa << endl;
   cout << "Exam Avg. " << Alice.exam << endl;
   cout << "Homework avg. " << Alice.homework << endl;
   cout << "Grade " << Alice.grade << endl;

   cout << endl << endl;
   system("pause");
   return 0;
}

10. This completes the example. You should compile and run the program
entering data for Alice. We will get to Bob later.

Proceed to the next page where we will introduce functions.

Answer 1

CODE :

#include<iostream>
using namespace std;

//This is user defined data type called "struct"
struct restro{
   char name[30];
   int date;
   int time;
   int number;
   char email[30];
   int phn_number;
};
int main(){

//Array of objects
   restro r[100];
   int n;
   cout<<"Enter the reservations you want to make :";
   cin>>n;
   cout<<"Please Enter the Details";

//loop for taking input
   for(int i=0;i<n;i++){
       cout<<"\nReservation "<<i+1<<endl;
       cout<<"======================================================\n";
       cout<<"Enter the name :";
       cin>>r[i].name;
       cout<<"\nEnter the date of reservation : ";
       cin>>r[i].date;
       cout<<"\nEnter the time of reservation : ";
       cin>>r[i].time;
       cout<<"\nEnter the number : ";
       cin>>r[i].number;
       cout<<"\nEnter Email : ";
       cin>>r[i].email;
       cout<<"\nEnter your phone number : ";
       cin>>r[i].phn_number;
       cout<<"======================================================\n";
   }
   cout<<"\n\nDetails of the Reservation";

//loop for the output
   for(int i=0;i<n;i++){
       cout<<"\nReservation "<<i+1<<endl;
       cout<<"======================================================\n";
       cout<<"Name :"<<r[i].name;
       cout<<"\nDate of reservation : "<<r[i].date;
       cout<<"\nTime of reservation : "<<r[i].time;
       cout<<"\nNumber : "<<r[i].number;
       cout<<"\nEmail : "<<r[i].email;
       cout<<"\nYour phone number : "<<r[i].phn_number;
       cout<<"\n======================================================\n";
   }
}