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Thanks that works a bit better, is there no constant for just pi?

I presume that's using the inverse tan of 1 or something is it?

impinduc=2*3.142*workingfreq*indctnce;


I just want to use the exact value of pi instead of 3.142!

OK now this one really is a stupid question:

How do I use pi in calculations?

I've included math.h, and i've tried M_PI but it doesn't work


Thanks again!

Thanks for that! It's working now :D

Hi. This is probably a really simple question but I can't find how to do it in any of my notes!


I am writing a program in C and part of it needs to create a file, the name of which is inputted...