運行一下代碼Private Sub Command1_Click()Dim n As Singlen = 0For s = 1 To 50n = n + 0.1Next sPrint nEnd Sub輸出n的結果竟然是 4.999998 ，不是5才正確嗎還有這個Private Sub Command1_Click()Dim s, x, y As Singlex = 0.1y = 0.1s = x + yPrint sEnd Sub輸出的結果是.200000001490116 ，為什么后面會...？但是我把它改成Private Sub Command1_Click()Dim x, y, s As Singlex = 0.1y = 0.1s = x + yText1.Text = sEnd Sub就正常了。是什么原因？？