43.執行 Microsoft Visual Basic 指令 Call S1(2) 呼叫下列程式片段時,所印出的 X 值為何?
Sub S1(ByVal X As Integer)
Call S2(X, X, X)
Print X
End Sub
Sub S2(ByRef A As Integer, ByVal B As Integer, ByRef C As Integer)
A = A+1:B = B+2:C = A+B*C
End Sub
(A) 7
(B) 15
(C) 18
(D) 23
的
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