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Struct Data Types and Digital Clock Simulation with Alarm in C++

This lab exercise focuses on understanding struct data types through practical examples, particularly for passenger flight details and a digital clock simulation program. Students will define data types such as Flight to hold information like seat number and status. The main task is to implement a multi-file program simulating a digital clock with alarm and snooze functionalities, using struct to manage hours, minutes, seconds, and AM/PM flags. The program will handle real-time clock updates and alarms, enhancing skills in C++ programming and struct management.

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Struct Data Types and Digital Clock Simulation with Alarm in C++

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  1. Lab Session-13 CSIT-121 Spring 2005 • Struct data type • Group Lab Exercise

  2. Groups fit together in struct types • Examples of logical groups • Passenger Name, Flight Number, Seat Number and Status • Book Name, Author, Year published, Catalogue Number, Status • Student Name, SS#, Current courses

  3. Flight group example • struct flight • { • int SNo; • char name[40]; • char aisle; • int seat; • char status; • };

  4. Flight group example • We have defined a data type by the name flight. • We can now declare variables of this data type • Example: flight toparis; • we can use toparis in our program now

  5. Flight group example • For Example: • toparis.seat=24; toparis.aisle=‘F’; • toparis.status=‘K’; (K means OK)

  6. Group Lab Exercise (Demo Due 5/4) • Write a multi-file program that can simulate a digital clock with alarm and snooze operations • In the program, define a struct data type that can hold hours, minutes, seconds and a char flag for AM or PM

  7. Demo Data • Demo Data is as follows: • Time: Hours: 11, Minutes: 59, Seconds: 0, AM/PM: ‘A’ • Alarm Time: Hours:12, Minutes: 02, Seconds: 05, AM/PM: ‘P’ • The program should display: • 11:59:00 AM • After one minute: • 12:00:00 PM • At 12:02:05, the alarm starts ringing (cout<<" \7F";) • It rings three times with one second gap between each ring. The user is asked “snooze?” enter ‘y’ or ‘n’ (use getch() to pick one char) • If entered ‘y’, alarm is silenced and the time to ring the alarm is incremented by 2 minutes. After 2 minutes, the alarm should ring again. • Throughout the time the alarm is ringing, the clock keeps running • Do your best and come up with a fully working program. Good luck!!

  8. Help: Familiar Format • You may want to waste about one second with this idle loop. Plug it in to your program where you need the delay of one second: • for (int j=0; j<500000000; j++); • system("cls"); //to clear the screen

  9. Help: Unfamiliar Format • Instead of : • #include <iostream> • #include <iomanip> • Using namespace std; • Use the following directives (Old C Style): • #include <stdio.h> • #include <windows.h> • #include <iomanip.h> • Then use the following line to sleep for one second: • Sleep(1000);

  10. Help: Both Formats • You also need the following statements in the beginning to set the format of your output: • cout.setf(ios::fixed | ios::right); • cout.fill('0'); //leading zeroes displayed

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