小编Gle*_*nnC的帖子

这是我的测试代码:

Dim testSingle As Single = 7.2
Dim testSingleF As Single = 7.2F
Dim testDouble As Double = 7.2

If testSingle = testDouble Then ' this is false
    Label1.Text = "true"
Else
    Label1.Text = "false"
End If

If testSingleF = testDouble Then ' this is false
    Label2.Text = "true"
Else
    Label2.Text = "false"
End If

If testSingle = 7.2F Then ' this is true
    Label3.Text = "true"
Else
    Label3.Text = "false"
End If

正如您在我的评论中所看到的,前两个陈述是错误的,第三个是真的.这是为什么？精度应该无关紧要,因为它的数量很少.

这里发生了什么？