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三、如下程式碼所構成的方法/ 函數 (method/function)，在呼叫時，使用recursiveFlowControl(3, “ss”, “dd”, “aa”)，請問該方法被呼叫執行後，顯示結果為何？如為語法有誤或執行時期發生中斷，請說明原因，並請修正錯誤或引起中斷的程式，讓程式可以正常執行結束並顯示結果。註：System.out.println( )；會將小括號中的字串顯示到螢幕輸出裝置。（15分）

void recursiveFlowControl(int num, String s1, String s2, String s3)

{ System.out.println(“... I am here ...”);

if (num == 1)

{   System.out.println(“num==1, Move from ” + s1 + “ to ” + s2); }

else

{   recursiveFlowControl(num-1, s1, s3, s2);

System.out.println(“num!=1, Move from ” + s1 + “ to ” + s2);

recursiveFlowControl(num-1, s3, s2, s1);

}

} // End of recursiveFlowContorl

package test1_1;

public class Main {

    public static void main(String[ ] args) {

        recursiveFlowControl(3, "ss", "dd", "aa");

    }

    static void recursiveFlowControl(int num, String s1, String s2, String s3) {

        System.out.println("... I am here ...");

        if (num == 1) {

            System.out.println("num==1, Move from " + s1 + " to " + s2);

        }

        else {

            recursiveFlowControl(num-1, s1, s3, s2);

            System.out.println("num!=1, Move from " + s1 + " to " + s2);

            recursiveFlowControl(num-1, s3, s2, s1);

        }

    } // End of recursiveFlowContorl

}