arrays, functions, HELP

This is a discussion on arrays, functions, HELP within the C Programming forums, part of the General Programming Boards category; Code: i have another question on arrays if the program is to scanf and read in values in this form: ...

  1. #1
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    arrays, functions, HELP

    Code:
    i have another question on arrays
    if the program is to scanf and read in values in this form:
    
    30.0 50.4 60.0
    40.9 69.9 30.9
    
    ...hence
    x   y   z format
    
    
     and the list can go to no more than 100, how would i declare and add three parallel arrays ?
    
    i then have a function that reads in these numbers to caluculate, say x*y*z for row 1 then row 2 and so on..and then add the total. how would i change this function as to alter the reading loop so that it reads into my data structure, allowing it to be repeatley manipulted?
    any genius out there that could give me an outline for this?
    
    so far i have written the program without using arrays and simply using 2 functions-one from the main that scans in the values and another in the format
    
    double
    mult_i(double x double y  double z){
       body
    return soemthing;
    }

  2. #2
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    Have you not already started a thread on a very similar subject?

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  3. #3
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    You mean a table of <unknown>x3 doubles? Try to declare an array of <unknown> arrays of 3 doubles. Then try to access the first value in the first array. It will go.

  4. #4
    ATH0 quzah's Avatar
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    Quote Originally Posted by Brafil View Post
    You mean a table of <unknown>x3 doubles? Try to declare an array of <unknown> arrays of 3 doubles. Then try to access the first value in the first array. It will go.
    No. You can't declare an array without a size specifier and actually expect to use it to infinity. That would be like declaring a pointer, not making it point anywhere, and assuming it is pointing at limitless memory.


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

  5. #5
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    So perhaps you could declare 3 arrays of type double, and make the size of each one 100.

    Then, as you add the data into the array, just keep a count so you know where the end of the legitimate data is.

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