Thread: Unable to create a simple function

Hi Friends,

This is my first message on this forum. I am trying to learn C language. Recently i was trying to find a solution for a
problem..... To be more specific I was trying to make C-Function for a proble, lets say If a user inputs 2 different times of a day & a band period, we want to find whether Action_Start_Time lies in range of Present_Time+band_Period, let me explain with the help of an example. lets say he enters:-

1.)Present_Time :- 00:30
2.)Action_Start_Time :- 00:29
3.)band_Period :- 90 minutes


we need to know whether Action_Start_Time(00:29) lies anywhere between 00:30(Present_Time) -- to -- 02:00 (Present_Time

+band_Period)

Now, in this example the answer should be "No".



Now lets take one more example, lets say he enters:-

1.)Present_Time :- 23:30
2.)Action_Start_Time :- 00:05
3.)band_Period :- 90 minutes


now here we need to know whether Action_Start_Time(00:05) lies anywhere between 23:30(Present_Time) -- to -- 01:00 (Present_Time +band_Period)

Now, in this example the answer should be "Yes".

I hope I'm clear enough. Thanks a lot for giving me your time. :-). I have to work in 24 hours mode. Not with 12am/pm mode.

With Best Regards,
garg

Don't over think it. It's just a simple carry over, after Midnight.

if(2400 hrs is less than (present time- [which is really a start time] + Period), then carry over the difference to the next day. If the target date falls anywhere in there, you've got a "Yes".

If you call "Present_Time", "start time", and call "band_Period", "ending time", and think of "Action Start Time" as "target time", it might help you see it.

And welcome to the forum.

Thanks a lot for replying "Adak". First of all I am sorry for posting wrong logic. What I actually need goes like this:-

Lets say we have to start a motor at a particular time, in case there was no power supply at motor start time , & the power resumes after sometime we now need to check whether "Motor start time" lies between (Present time + band period) or has the period got over. By "Present_Time" I mean to say the time actually in the clock. By "band period" i mean to say the maximum time allowed beyond the Motor_Start_Time to start the motor. Your method works great for below 3 conditions(Motorstart time + band_period - Present time) but for last one it fails.

1st For example, lets say:-

1.)Present_Time :- 00:10 (when the power resumed)
2.)Motor_Start_Time :- 23:30 (Lets say power was not present at this time)
3.)band_Period :- 90 minutes

In this example motor can start if power resumes upto 0100 (23:30 + 90 minutes) the answer should be "Start the Motor".



2nd For example, lets say:-

1.)Present_Time :- 23:00 (In this case still their is time to start the motor)
2.)Motor_Start_Time :- 00:10
3.)band_Period :- 90 minutes

In this example the answer should be "do not start the Motor".



3rd For example, lets say:-

1.)Present_Time :- 03:00 (when the power resumed)
2.)Motor_Start_Time :- 23:30
3.)band_Period :- 90 minutes

Now as the period which was allowed to start the motor has got over the motor shouldn't start so in this example the answer should be "do not start the Motor".



Now In 4th case, lets say:-

1.)Present_Time :- 03:00 (when the power resumed)
2.)Motor_Start_Time was:- 21:00
3.)band_Period :- 90 minutes

here maximum time that was allowed was uptil 2230 hrs but power resumed at 0300 hrs so the motor shouldn't start but formula gives reverse result, so should there be some other second condition included?

Thanks a lot once again,

With best regards,
garg