printing to an array

This is a discussion on printing to an array within the C Programming forums, part of the General Programming Boards category; i have a text file that contains numbers and i am reading them in line by line, this is not ...

  1. #1
    Registered User zmerlinz's Avatar
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    [**RESOlVED**]printing to an array

    i have a text file that contains numbers and i am reading them in line by line, this is not a problem

    but the problems come when i try to get these numbers and put each number in the array, for some reason it just seems to take the first character (either a 0 or a -) and it printts out it's ASCII equivialant and i don't want this

    any ideas on how to remedy this ??

    here is the code so far

    any help will be appreciated

    cheers
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    Last edited by zmerlinz; 04-29-2003 at 07:59 AM.
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  2. #2
    ATH0 quzah's Avatar
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    That's because you are reading a character, and you're assigning it as a character:
    Code:
    numbers[i] = (double)*nums;
    This says "Give me the decimal value of whatever character I read, and use that as a float.

    Quzah.
    Hope is the first step on the road to disappointment.

  3. #3
    Registered User zmerlinz's Avatar
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    the file that i am reading in contains a long double on every line

    so how would i remedy it so that it enters these into the array ?

    thankyou for your speedy response
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  4. #4
    ATH0 quzah's Avatar
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    Assuming your compiler / libraries provide something like atof, you can just use that. Otherwise, you'll need to use something like sscanf to read it into a variable.

    Quzah.
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  5. #5
    Registered User zmerlinz's Avatar
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    so if i were to use sscanf()

    i would do something like this ?/

    Code:
    sscanf(nums, numbers[i], float);
    sorry for all the questions but this is beginning to bug me
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  6. #6
    Registered User zmerlinz's Avatar
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    atof doesn't seem to work properly

    here is a copy of the txt file if it helps ??
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  7. #7
    ATH0 quzah's Avatar
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    Originally posted by zmerlinz
    so if i were to use sscanf()

    i would do something like this ?/

    Code:
    sscanf(nums, numbers[i], float);
    sorry for all the questions but this is beginning to bug me
    No, it'd be something like this:

    sscanf( nums, "%f", &numbers[i] );

    sscanf works just like scanf, except you specify where you scan from as the first argument.

    Quzah.
    Hope is the first step on the road to disappointment.

  8. #8
    End Of Line Hammer's Avatar
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    Or better still, use strtod(). The FAQ shows some examples of getting numbers.
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  9. #9
    Registered User zmerlinz's Avatar
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    Originally posted by quzah
    No, it'd be something like this:

    sscanf( nums, "%f", &numbers[i] );

    sscanf works just like scanf, except you specify where you scan from as the first argument.

    Quzah.
    i have done that now, but it still doesn't seem to work, all it prints out is 1000 lines of 0.000000000000000

    so it seems that it isn't working with those values at all

    any idea where it is going wrong ??

    Cheers
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  10. #10
    Registered User zmerlinz's Avatar
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    ok

    here is the C file and text file that it is reading in
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  11. #11
    Registered User zmerlinz's Avatar
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    and here is the txt file

    thanks for your help
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  12. #12
    Registered User zmerlinz's Avatar
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    i see what you say, and i have implemented that now,

    but it still prints out 1000 lines of 0.000000000000000

    it is driving me mad !!
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  13. #13
    Registered User zmerlinz's Avatar
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    Talking

    Thank you ever so much,it is finally working

    and i have learnt a lot from this to

    sorry about all the questions


    Thanks to all that helped
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