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The LnXP1() function is used to calculate the
natural logarithm of a number that is being incremented to 1. The syntax of
this function is
Extended __fastcall LnXP1(Extended X);
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When executing, this function takes one argument, X,
adds 1 to X, and then calculates the natural logarithm, also called the
Napierian logarithm, of the new number. The formula used is
Result = ln(X+1)
Here is an example:
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
Extended X, Result;
X = StrToFloat(Edit1->Text);
Result = LnXP1(X);
Edit2->Text = FloatToStr(Result);
}
//---------------------------------------------------------------------------
