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以下哪一项代码能正确地定义并调用一个Function函数？
A.Function sum(x As Integer, y As Integer) As Integer
Return x + y
End Function
Call sum(2, 3)
B.Function sum(x As Integer, y As Integer) As Integer
sum = x + y
End Function
sum(2, 3)
C.Function sum(x As Integer, y As Integer)
Return x + y
End Function
sum(2, 3)
D.Function sum(x As Integer, y As Integer) As Integer
Return x + y
End Function
sum(2, 3) = 5
优质解答
答案
B
解析
在Visual Basic中，Function函数的返回值应通过函数名进行赋值，即在函数内部使用 'sum = x + y' 而非 'Return'，且调用时不能使用赋值号。选项B是正确的。
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