Float64 printing?

How do I correctly print a float64? Is it possible with printf, or do I need to look for some other kind of conversion routine?

@alfkil

Well %f prints a float, so I would assume %llf for a 64bit version.

In the past I have had problems printing 64bit numbers unless they are "aligned", so make sure the 64bit argument is the first or at least aligned, like so:

printf("number: %lld\n", num );

whereas:

printf("number 1: %ld number 2: %lld\n", longnum, longlongnum );

will print the 64bit number incorrectly.

Simon

@Rigo

Ok, that was very helpful, thanks!

@alfkil

Quote:

'float64' is not a built-in 'C' data type. Can you check what it actually represents? I guess it might just be the old "double" type (double precision IEEE 754 floating point number), which according to the standard is a 64 bit entity.

As such printf("%f",...) should work just fine.