series equation?!

This is a discussion on series equation?! within the C Programming forums, part of the General Programming Boards category; I am not mainly asking about a code but I would like to have some help with how to start ...

  1. #1
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    series equation?!

    I am not mainly asking about a code but I would like to have

    some help with how to start logically with solving this series:

    II=4*(1-1/3+1/5-1/7+1/9-1/11+1/13-.....)

    the program will ask the user about the number of terms he

    wants,

    and then depend on these terms calculate and display the

    approxmation of II.

  2. #2
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    for ( i = 1 ; i <= 13 ; i += 2 )
    That generates all the denominators for your terms in your series

    int sign = 1;
    sign = sign * -1;
    If you keep doing that in a loop, sign alternates between +1 and -1
    Use this to alternately add and subtract successive terms
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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    many thanks for your great help.

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