A:p->right=s; s->left=p; p->right->left=s; s->right=p->right;
B:s->left=p;s->right=p->right;p->right=s; p->right->left=s;
C:p->right=s; p->right->left=s; s->left=p; s->right=p->right;
D:s->left=p;s->right=p->right;p->right->left=s; p->right=s;
B:s->left=p;s->right=p->right;p->right=s; p->right->left=s;
C:p->right=s; p->right->left=s; s->left=p; s->right=p->right;
D:s->left=p;s->right=p->right;p->right->left=s; p->right=s;
正确答案
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