參考PB幫助中Truncate函數的說明：

Using Truncate on a computed field????? A real number loaded into a floating point register (used for calculation) is represented as precisely as the binary storage will permit. For example, the real number displayed as 2.07 is actually stored as 2.0699999999999997.

Truncating such a number may not give the expected result. To avoid this problem, you can change the initial real data type to long, integer, or decimal, or you can append a constant in the truncate argument: Truncate (x + 0.0000001, n )

?

xg1=dec(left(mpart[8],4))
gonglv=truncate(xg1 / 100,2)

?

注意，這里的xg1如果是int類型的話，就會發生上面的錯誤，將其類型修改為DEC后，解決！

轉載于:https://www.cnblogs.com/wjonjon/archive/2010/07/14/1777023.html

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