log10(8)

[Charles Hannum]

In article <1990Feb26.031254.11354 at cubmol.bio.columbia.edu>,
ping at cubmol.bio.columbia.edu (Shiping Zhang) says:
>
>In article <3244 at servax0.essex.ac.uk> elzea at sersun0.essex.ac.uk (El-Zein A A)
>writes:
>
>>       My calculator gives me 0.9030899 for log(8),
>>       While the following code (which I thought would
>>       give me the above value of 0.9030899) prints
>>       -312.770165.
>        .
>>       double l;
>
>>       l = log10(8);
>>       printf("%f", l);
>
>>       Can anybody tell me why.

>log10() expects a double as its argument. So use 8.0 instead of 8.
>
You may also have to change the printf() to:

   printf("%lf", l);


Virtually,
- Charles Martin Hannum II       "Klein bottle for sale ... inquire within."
    (That's Charles to you!)     "To life immortal!"
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