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import java.io._
object Main 
{
        def main(args: Array[String]) 
        {
                var stdin = new BufferedReader(new InputStreamReader(System.in));
                var a = stdin.readLine();
                var b = stdin.readLine();
                println("a is "+a+" b is "+b);
        
                if(a > b)
                        println(a+" is greater");
                else
                        println(b+" is greater");
        }
}
 

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• # 2:   hide show   clone   input   112 days 15 hours ago    Success

  結果: Success     time: 0.1s    記憶體: 211648 kB     回傳值: 0

  input:

  5
  10
  

  output:

  a is 5 b is 10
  5 is greater
  
• # 1:   hide show   clone   input   112 days 15 hours ago    執行期間發生錯誤（RE）

  結果: 執行期間發生錯誤（RE）     time: 0.1s    記憶體: 211648 kB     信號（Signal）: -1

  input: 無
  output:

  a is null b is null
  

  stderr:

  Exception in thread "main" java.lang.NullPointerException
  	at scala.collection.immutable.StringLike$class.compare(StringLike.scala:68)
  	at scala.collection.immutable.StringOps.compare(StringOps.scala:31)
  	at scala.collection.immutable.StringOps.compare(StringOps.scala:31)
  	at scala.math.Ordered$class.$greater(Ordered.scala:46)
  	at scala.collection.immutable.StringOps.$greater(StringOps.scala:31)
  	at Main$.main(Main.scala:11)
  	at Main.main(Main.scala)