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n = 0
For i = 1 To Len(Text1.Text)
c = Mid(Text1.Text, i, 1)
If c >= "0" And c <= "9" Then m = 1 Else m = 2
a(m) = a(m) + 1
If a(m) = 1 Then n = n + 1
Next i
数组a各元素的初始值都为0，文本框Textl的内容为“Happy2017”。执行程序后，变量n的值为（ ）
| A．1 | B．2 | C．4 | D．9 |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
