填空题 [说明]
用输入/输出写一个程序,让用户输入一些姓名和电话号码。每一个姓名和号码将加在文件里。用户通过点“Done”按钮来告诉系统整个列表已输入完毕。 如果用户输入完整的列表,程序将创建一个输出文件并显示或打印出来。格式如:555,1212,Tom 123-456-7890,Peggy L.234-5678,Marc 234-5678,Ron 876-4321,Beth&Brian 33.1.42.45.70,Jean-Marc。
[Java 代码]
import java. io.*;
class Phones

statlc FileOutputStream fos;
public static final int lineLength =81;
public static void main (String args []) throws IOExeption

byte [] phone=new byte [lineLength];
byte [] name=new byte [lineLength];
int i;
try

fos= new FileOutputStream ("phone. numbers");

catch (FileNotFoundException e)
while (true)

(1) ("Enter a name (enter 'done' to quit)");
(2) (name);
if ("done". equalsIgnoteCase (new String (name,0,0,4)))

break;

System.err.println ("Enter the phone number");
readLine (phone);
for (int i=0;phone [i]!=0;i++)

(3)

fos.write (',');
for (int i=0 (4) ;i++)

fos. write (name [i]);

fos. write ('/n');

fos. close();

private static void readLine (byte line []) throws IOException

int i=0,b=0;
while ((i< (5) )&& ((b=System.in.read ())!='/n'))

line[i++] = ( byte ) b;

line[i]= ( byte ) 0;



  • 1、
【正确答案】 1、{{*HTML*}}(1)System. err. println (2) readLine
(3) fos. write(phone[i]) (4) name[i]!=0
(5) lineLength-1    
【答案解析】