19当a=1,b=3,c=5,d=5时,执行下面一段程序后,x的值为

Question

A)1 B) 2 C) 3 D) 6
if(a<b)
if(c<d) x=1;
else
if(a<c)
if(b<d) x=2;
else x=3;
else x=6;
else x=7;

Answer 1

B，if和else对应好。
a = 1: b = 3: c = 5: d = 5
If (a < b) Then
If (c < d) Then
x = 1
Else
If (a < c) Then
If (b < d) Then
x = 2
Else
x = 3
End If
Else
x = 6
End If
End If
Else
x = 7
End If
Print x
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Answer 2

B,这是分支。你一层一层往下就出来了