下面VB程序的功能为:在文本框Text1和Text2中输入两个整数,单击按钮对象Command1,在标签对象Label1中显示这两个数的差。 Function lsc(x,y) As Integer If x>y Then lsc=x-y Else lsc=y-x End If End Function Private Sub Command1_Click( ) Dim a1 As Integer,a2 As Integer a1=Val(Text1.Text) a2=Val(Text2.Text) Label1.Caption= End Sub 要实现上述功能,程序画线处应填入的语句为( )
A . lsc(x,y)
B . lsc(Text1.Text,Text2.Text)
C . lsc
D . lsc(a1,a2)
答案:D