知识点:程序填空(三) 以下程序段用于输入整数n,在窗体上显示如下图所示具有n行的杨辉三角。 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 … Dim s(20, 20) As Integer Dim i%, j%, k%, n% n = InputBox("输入一个正整数:") For i = 1 To n s(i, 1) = 1 (4) =1 Next i For i = 3 To n For j = 2 To i - 1 s(i, j) = s(i - 1, j - 1) (5) Next j Next i For i = 1 To n For j = 1 To i Print s(i, j). Next j (6) Next i