定义String s=null,会出现异常的选项是()。Ⅰ:if((s!=null)(s.length()>0))Ⅱ:if((s!=null)(s.length()>0)) Ⅱ:if((s!=null)(s.length()>0)) Ⅲ:if(s==null)|(s.length()==0)) Ⅳ:if(s==null)||(s.length()==0))A.Ⅱ、ⅢB.Ⅱ、Ⅲ、ⅣC.Ⅰ、ⅢD.Ⅲ、Ⅳ
定义String s=null,会出现异常的选项是()。Ⅰ:if((s!=null)&(s.length()>0))Ⅱ:if((s!=null)&am
定义String s=null,会出现异常的选项是( )。 Ⅰ:if((s!=null)&(s.length()>0)) Ⅱ:if((s!=null)&&(s.length()>0)) Ⅲ:if(s==null)|(s.length()==0)) Ⅳ:if(s==null)||(s.length()==0))
A.Ⅱ、Ⅲ
B.Ⅱ、Ⅲ、Ⅳ
C.Ⅰ、Ⅲ
D.Ⅲ、Ⅳ
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定义String s=null,会出现异常的选项是()。Ⅰ: if((s!=mll)(s.length()>0))Ⅱ: if((s!=mull)(s.length()>0)) Ⅱ: if((s!=mull)(s.length()>0)) Ⅲ: if((s==null)|(s.length()==0)) Ⅳ: if((s==aull)Ⅱ(s.length()==0))A.Ⅱ、ⅢB.Ⅱ、Ⅲ、ⅣC.Ⅰ、ⅢD.Ⅲ、Ⅳ
已知last指向单向简单链表的尾结点,将s所指结点加在表尾,不正确的操作是____。A.last->next=s,last=s,last->next=NULL;B.last->next=s,s->next=NULL,last=s;C.s->next=NULL, last->next=s, s=last;D.s->next=NULL, last->next=s,last=s;
7、已知last指向单向简单链表的尾结点,将s所指结点加在表尾,正确的操作是____。A.s->next=s,last=s,last->next=NULL;B.last->next=s,s->next=NULL,last=s;C.s->next=NULL, last->next=s, s=last;D.s->next=last, last->next=NULL,last=s;
已知last指向单向简单链表的尾结点,将s所指结点插入在表尾,正确的操作是____。A.s->next=s,last=s,last->next=NULL;B.last->next=s,s->next=NULL,last=s;C.s->next=NULL, last->next=s, s=last;D.s->next=last, last->next=NULL,last=s;
已知last指向单向简单链表的尾结点,将s所指结点加在表尾,正确的操作是____。A.s->next=s,last=s,last->next=NULL;B.last->next=s,s->next=NULL,last=s;C.s->next=NULL, last->next=s, s=last;D.s->next=last, last->next=NULL,last=s;
已知last指向单向简单链表的尾结点,将s所指结点加在表尾,不正确的操作是____。A.s->next=NULL, last->next=s,last=s;B.s->next=NULL, last->next=s, s=last;C.last->next=s,s->next=NULL,last=s;D.last->next=s,last=s,last->next=NULL;
7、设有一个串s,和一个int型变量i,以下那条语句可能产生异常?A.if ((s !=null) (i ==s.length()))B.if ((s ==null) (i ==s.length()))C.if ((s !=null) || (i ==s.length()))D.if ((s ==null) || (i ==s.length()))
设有一个串s,和一个int型变量i,以下那条语句可能产生异常?A.if ((s !=null) (i ==s.length()))B.if ((s ==null) (i ==s.length()))C.if ((s !=null) || (i ==s.length()))D.if ((s ==null) || (i ==s.length()))