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time calculation help
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hi guys,
I am making a program in which I have to enter start date and time and stop date and time in format like 01:05:07 15:26:57
I know that i need to use <time.h> function for that but i don't know how can i calculate the difference between time. i have no clue of that. could you guys give me some tips on that?
I am making a program in which I have to enter start date and time and stop date and time in format like 01:05:07 15:26:57
I know that i need to use <time.h> function for that but i don't know how can i calculate the difference between time. i have no clue of that. could you guys give me some tips on that?
Last edited by rajsharma_85; Nov 20th, 2007 at 11:17 am.
This may not be the best way to do it but, you could build a function to convert the times into seconds and use subtraction. Your function would have to tokenize the time format using the : as a break.
Actually, you don't even need to convert the times into seconds. Just tokenize the time into hours and minutes then subtract. Your output will already be in the correct format.
Mark
Actually, you don't even need to convert the times into seconds. Just tokenize the time into hours and minutes then subtract. Your output will already be in the correct format.
Mark
Last edited by dmmckelv; Nov 20th, 2007 at 11:30 am.
but i am already taking input from the user in hours minutes and seconds in hh:mm:ss format. but i don't know how to calculate the difference between two different inputs. i don't know that particular equation
do you mean to say (hh:mm:ss)-(hh:mm:ss) ?
do you mean to say (hh:mm:ss)-(hh:mm:ss) ?
Last edited by rajsharma_85; Nov 20th, 2007 at 11:41 am.
Sure, use a tokenizer to separate HH, MM, and SS from HH:MM
S. Then subtract HH from your other HH, MM from MM, etc. As long as it is in 24hr format it should work. You will have to write some code to decrement HH and MM if you need to borrow. Once you have done the math, put the answer back into a string in the format of HH:MMS or whatever other format you need.
Mark
I don't know what the deal is with the smileys but I mean ": S" minus the space." Stupid smileys.
S. Then subtract HH from your other HH, MM from MM, etc. As long as it is in 24hr format it should work. You will have to write some code to decrement HH and MM if you need to borrow. Once you have done the math, put the answer back into a string in the format of HH:MMS or whatever other format you need.Mark
I don't know what the deal is with the smileys but I mean ": S" minus the space." Stupid smileys.
Last edited by dmmckelv; Nov 20th, 2007 at 11:46 am. Reason: Stupid Smileys
thanks for your help dmmclev.
can i ask you one more question? what should i do if i want to refresh that time every second?
for example, i am my program is recording a channel between start and stop time and i want to show the amount of time that has been recorded and make it refreshing every second.
can i ask you one more question? what should i do if i want to refresh that time every second?
for example, i am my program is recording a channel between start and stop time and i want to show the amount of time that has been recorded and make it refreshing every second.
Each second add 1 to a counter and output that counter.
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