alliedmodders/sourcemod

float or float FMT decimals glitch

ClaudiuHKS opened this issue · 1 comments

ClaudiuHKS commented 
PrintToServer("StringToFloat(4.200000) = %f, 4.200000 = %f", StringToFloat("4.200000"), 4.200000);

=>

/// StringToFloat(4.200000) = 4.199999, 4.200000 = 4.199999

Tried on i7 4790K, Windows 11, SM 1.12.0.7100 & SMM 2.0.0-dev+1278.
Also, if compiling a SM extension which applies *pParam1 = sp_ftoc(4.200000);, when PrintToServer(), will print 4.199999.

asherkin commented

The behaviour here is as expected, 4.2 can't be accurately represented in a IEEE-754 floating point value - the nearest valid value is 4.19999980926513671875, which when formatted to a precision of 6 (the default when not included in the format specifier), produces the output you're seeing.

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