再帰（減算および印刷番号）

Question

は、誰かが次のコードの出力は、それが再帰と呼ばれています1 2 3 4 5

mystery6(5); System.out.println(); 

    static void mystery6(int n) 
    { 
     if(n==0) return; 
     mystery6(n-1); 
     System.out.print(n+" "); 
    } 

Answer 1

ある方法を説明でした。ここで

You call it with 5. 
    It calls itself with 5 -1 or 4. 
    It calls itself with 3 
    It calls itself with 2 
    It calls itself with 1 
    It calls itself with 0 
    Then it unwinds. It returns to 1 
    Prints 1 
    Prints 2 
    Prints 3 
    Prints 4 
    Prints 5 
    exits. 

Answer 2

は（インデントを気に）それがどのように動作するかです：

mystery6 is called with 5, 5 != 0 so it calls itself with 4 
mystery6 is called with 4, 4!= 0 so it calls itself with 3 
    mystery6 is called with 3, 3 != 0 so it calls itself with 2 
    mystery6 is called with 2, 2 != 0 so it calls itself with 1 
    mystery6 is called with 1, 1 != 0 so it calls itself with 0 
    mystery6 is called with 0, 0 == 0 so it returns 
    mystery6 call with 1 is returned, it prints 1 
    mystery6 call with 2 is returned, it prints 2 
    mystery6 call with 3 is returned, it prints 3 
mystery6 call with 4 is returned, it prints 4 
mystery6 call with 5 is returned, it prints 5