Thread: Defining three functions that implement, forward, backward, and centered difference.

  1. #1
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    Defining three functions that implement, forward, backward, and centered difference.

    Hello! I need to define three functions in C that implement the forward, backward, and centered difference. They are defined as followed:

    Forward Difference:
    u(x+h)-u(x)
    --------------
    h

    Backward Difference:
    u(x)-u(x-h)
    -------------
    h

    Centered Difference:
    u(x+h)-u(x-h)
    ---------------
    2h

    How could I write these in C to implement them into my program? Thank you in advance!

  2. #2
    and the hat of int overfl Salem's Avatar
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    Code:
    int forwardDifference( int x, int h ) {
        return u(x+h)-u(x) / h ;
    }
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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