______ deals with the extra meaning of the utterance produced on the basis of its literal meaning.
A. Locutionary act
B. Performative act
C. Perlocutionary act
D. lllocutionary act
在窗体上画一个名称为Command1 的命令按钮和一个名称为Text1的文本框,然后编写如下程序: Private Sub Command1_Click( ) Dim x,y,z As Integer x=5 y=7 z=0 Text1. text = " " Call P1 (x,y,z) Text1. Text = Str(z) End Sub Sub P1(ByVal a As Integer,ByVal b As Integer,c As Integer) c=a+b End Sub 程序运行后,如果单击命令按钮,在文本框中显示的内容是 ______。
A. 0
B. 12
C. Str(z)
D. 没有显示