Re: Weird floating point rounding - Bug or how to control it correctly

[Basile B. via Digitalmars-d-learn]

On Thursday, 14 September 2023 at 03:23:48 UTC, An Pham wrote:
import std.stdio;
    void main()
    {
        float f = 6394763.345f;
        
        import std.format : sformat;

        char[80] vBuffer = void;
        writeln("6394763.345 = ", sformat(vBuffer[], "%.4f", 
f));
        
    }

Output
6394763.345 = 6394763.5000

Classic question. The float literal `6394763.345f` is not 
representable as IEEE-754 floating point number.

Try https://www.h-schmidt.net/FloatConverter/IEEE754.html for a 
short introduction to the issue.