c = 0
For i = 1 To n - 1
k = i
For j = i + 1 To n
If a(j) < a(k) Then k = j
Next j
If i <> k Then
c = c + 1
t = a(i): a(i) = a(k): a(k) = t
End If
Next i
数组元素a(1)到a(6)的初始值依次是5,3,1,0,9,8,,执行该程序段后,变量c的值是( )