请问这里的read是不是有什么问题啊，总编译不过去，俺是新手，谢谢

[lonyce]

import java.lang.*;
public class Factor{

public static void main (String args[]) {
int c;
int fff;
int fac = 1;
while(true){
c = System.in.read();
if(c == '~'){
return;
}
for(fff = c; fff > 0;fff-- ){
fac = fac * fff;
}
System.out.println(c + "'s Factor is: " + fac);
}
}
}

[lonyce]

加了import java.io.*;也不行

[classjava]

import java.lang.*;
public class Factor{

public static void main (String args[])throws IOException {
int c;
int fff;
int fac = 1;
while(true){
c = System.in.read();
if(c == '~'){
return;
}
for(fff = c; fff > 0;fff-- ){
fac = fac * fff;
}
System.out.println(c + "'s Factor is: " + fac);
}
}
}

[knight12]

import java.lang.*;
import java.io.*;
public class Factor{

public static void main (String args[]) {
int c;
int fff;
int fac = 1;
while(true){
try{
c = System.in.read();
}
catch(IOException e)
{ e.printStackTrace(); }
if(c == '~'){
return;
}
for(fff = c; fff > 0;fff-- ){
fac = fac * fff;
}
System.out.println(c + "'s Factor is: " + fac);
}
}
}

[lonyce]

xiexie