a=[["data1",1],["data2",2],["data3",- 1]]
head=0;pre=head
while a[a[pre][1]][1]!=- 1:
pre=a[pre][1]
a[pre][1]=- 1
p=head
while a[p][1]!=- 1:
print(a[p][0],end="->")
p=a[p][1]
print(a[p][0])
执行该程序段后,输出的结果是( )
A.datal->data2->data3 | B.1->2->-1 |
C.datal->data2 | D.datal |
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