Time

This is a discussion on Time within the C Programming forums, part of the General Programming Boards category; I need to make program that will work under dos and i need to see how much time user need ...

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    Question Time

    I need to make program that will work under dos and i need to see how much time user need to press enter two times.

    If i use time () and diftime () (in time.h) they will give mi number of seconds, but i need it in milliseconds besaouse of precision!

    Any ideas???
    Last edited by Autoexes; 10-20-2001 at 10:11 AM.
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    seconds/milliseconds
    printf milliseconds

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    Guest Sebastiani's Avatar
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    This tops strange questions of the month! Lemme see, is this a curioso question or are we designing weapons systems here?? I couldn't help but to sense a strange urgency in your post, and well I AM a Texan and thus am quite prone to conspiritoral fits and general signs of nervousness when a person who has precisely 1 post on the board from no less than Serbia, asking for " high recision" timing!

    Forgive me if I am a little too paranoid!!

    Perhaps a U.K.er would have better judgement than I!



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    Thumbs down

    Well, sorry for my type mistaces, but i think that msg. boards shall not have posts like this!
    If you want to help me that's ok, if you dont wont to help me, that's ok too, but do not express that on this way!!!

    You can ignore my post, send me private message, or something like that, but it is stupid to post that on c forum!

    I think that best solution for all of us is that moderator delete our messages, and i change my 1st.

    p.s. I will not comment things about Serbia!
    Last edited by Autoexes; 10-20-2001 at 12:34 PM.

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    and the hat of wrongness Salem's Avatar
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    Use the clock() function.
    It's not quite millisecond precision, but its a lot better than seconds.
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    If at first you don't succeed, try writing your phone number on the exam paper.
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    ATH0 quzah's Avatar
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    > You can ignore my post, send me private message, or
    > something like that, but it is stupid to post that on c forum!

    Someone needs to get a sense of humor. It is a prerequisite for posting on any message board.

    Quzah.

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    Originally posted by Salem
    Use the clock() function.
    It's not quite millisecond precision, but its a lot better than seconds.
    Ok, thank you very much, but can you post any example?
    I know thet there is clock function i time.h and unix sys call, by i dont know how to utilise that function in "real chalange".
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  8. #8
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    timer example

    clock_t start, stop;

    start = clock();

    for(x=0; x<100000; x++);

    stop = clock();

    clock counts the number of processor 'ticks'.
    All spelling mistakes, syntatical errors and stupid comments are intentional.

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    add this to above

    time_in_secs = (stop - start) / CLOCKS_PER_SEC;

    I know you want more precision than seconds but this is a start
    All spelling mistakes, syntatical errors and stupid comments are intentional.

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    Originally posted by C_Coder
    add this to above

    time_in_secs = (stop - start) / CLOCKS_PER_SEC;

    I know you want more precision than seconds but this is a start
    I have read some man pages and found something like this, and there it is written that if i want to use something smaller then seconds i need to remove /CLOCK_PER_SECS because value of that variable is 1000000 or something like that.
    Last edited by Autoexes; 10-21-2001 at 06:30 AM.
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    clock() counts the number of processor 'ticks' while your program is running not an amount of time. CLOCKS_PER_SEC is a macro which turns the 'ticks' into a time, without using it the result from clock() would be meaningless as how would you know how many 'ticks' there were in an amount of time.
    I don't know how you can achieve millisecond precision but I hope someone can tell you as i'ts bugging the hell out of me!
    All spelling mistakes, syntatical errors and stupid comments are intentional.

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    Angry

    I found answer!

    The answer is GetTickCount() in windows.h, wich will return the number of milliseconds from starting the OS.

    Bad side is that this is running only onder Windows
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    If you want to get millisecond precision under Unix you can use

    gettimeofday(struct timeval*, struct timezone*);

    Cheers.
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