I'm trying to write floating point vars into my ini file and i encountered a problem with format specifiers. I have a float value, let it be 101.9716. Now i want to write it to my ini file, but the problem is i have another float values, which have less preceision (such as 15.85), and that values are writing to ini file in the same loop. so i do:
sprintf(valLineY, "%g", grade[i].yArr[j]);
All my other variables become nice chars like "20" (if it was 20.00000), "13.85" (if it was 13.850000) and so on. But 101.9716 becomes "101.972" for some reason. Can you please tell me why does this happen and how to make it "101.9716" without ruining my ideology (which is about removing trailing zeroes and unneeded perceisions). Thanks for any help.
Why this happens?
I tested:
And it output:
Here's what C standard (N1570 7.21.6.1) says about conversion specifier
g
:So given above, P will equal 6, because precision is not specified, and X will equal 2, because it's the exponent on style
e
.Formula 6 > 2 >= -4 is thus true, and style
f
is selected. And precision will then be 6 - (2 + 1) = 3.How to fix?
Unlike
f
, styleg
will strip unnecessary zeroes, even when precision is set.So set high enough precision:
prints: