division by 1/value

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I’m doing some work that needs complex mathematical equations. And I’m having a problem early on, when I try to do the 1/result split, the answer is always 0,000.

I have tried using double, float, Pow() and the result is the same. (all values are different from 0)

    capacitor = (2*pi*resistor*fc);
    printf("%lf\n", capacitor);
    capacitor = 1/capacitor;
    printf("%lf", capacitor);

Answer: 0.0000

c mathematics division
  • 3

    Change of 2 for 2.0 in multiplication solves the problem? Or the 1 for 1.0. I haven’t dealt with C for a long time, but it may be that he’s interpreting the constant as an integer and then the division turns out to be an integer. It talks a little about this: https://answall.com/a/254001/100416

  • 1

    I think it would help to post the whole code because the declaration of variables can influence the question.

  • Write for example capacitor = (2*pi*(double)resistor*fc); and capacitor = 1/(double)capacitor; forcing the compiler to calculate the whole expression as double. And, of course, declare capacitor as such...

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