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package game;
public class JieCeng {
 public static void main(String[] args){
  System.out.println(fun(10));
 }
 
 public static int fun(int n){
  if(1==n)
   return 1;
  System.out.println( n * fun(n-1));
  return ......

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import gnu.io.CommPortIdentifier;
import gnu.io.PortInUseException;
import gnu.io.SerialPort;
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