对输出感到困惑

Question

我是 java 编程新手。我刚开始阅读 Head first java 这本书。我在第一章找到了这个例子。

public class BeerSong {
    public static void main(String[] args) {
        int beerNum = 99;
        String word = "bottles";
        while (beerNum > 0)
        {
            if (beerNum == 1)
            {
                word = "bottle";
            }
            System.out.println(beerNum + " " + word + " of beer on the wall");
            System.out.println(beerNum + " " + word + " of beer");
            System.out.println("Take one down.");
            System.out.println("Pass it around.");
            beerNum = beerNum - 1;
            if (beerNum > 0)
            {
                System.out.println(beerNum +  " " + word + " of beer on the wall");
            }
            else
            {
                System.out.println("No more bottles of beer on the wall");
            }
        }
    }
}

我对输出感到困惑。

60 bottles of beer
Take one down.
Pass it around.
59 bottles of beer on the wall
59 bottles of beer on the wall
59 bottles of beer
Take one down.
Pass it around.
58 bottles of beer on the wall
58 bottles of beer on the wall
58 bottles of beer
Take one down.
Pass it around.
57 bottles of beer on the wall
57 bottles of beer on the wall
57 bottles of beer
Take one down.
Pass it around.
56 bottles of beer on the wall
56 bottles of beer on the wall
56 bottles of beer
Take one down.
Pass it around.
55 bottles of beer on the wall
55 bottles of beer on the wall
55 bottles of beer
Take one down.
Pass it around.
54 bottles of beer on the wall
54 bottles of beer on the wall
54 bottles of beer
Take one down.
Pass it around.
53 bottles of beer on the wall
53 bottles of beer on the wall
53 bottles of beer
Take one down.
Pass it around.
52 bottles of beer on the wall
52 bottles of beer on the wall
52 bottles of beer
Take one down.
Pass it around.
51 bottles of beer on the wall
51 bottles of beer on the wall
51 bottles of beer
Take one down.
Pass it around.
50 bottles of beer on the wall
50 bottles of beer on the wall
50 bottles of beer
Take one down.
Pass it around.
49 bottles of beer on the wall
49 bottles of beer on the wall
49 bottles of beer
Take one down.
Pass it around.
48 bottles of beer on the wall
48 bottles of beer on the wall
48 bottles of beer
Take one down.
Pass it around.
47 bottles of beer on the wall
47 bottles of beer on the wall
47 bottles of beer
Take one down.
Pass it around.
46 bottles of beer on the wall
46 bottles of beer on the wall
46 bottles of beer
Take one down.
Pass it around.
45 bottles of beer on the wall
45 bottles of beer on the wall
45 bottles of beer
Take one down.
Pass it around.
44 bottles of beer on the wall
44 bottles of beer on the wall
44 bottles of beer
Take one down.
Pass it around.
43 bottles of beer on the wall
43 bottles of beer on the wall
43 bottles of beer
Take one down.
Pass it around.
42 bottles of beer on the wall
42 bottles of beer on the wall
42 bottles of beer
Take one down.
Pass it around.
41 bottles of beer on the wall
41 bottles of beer on the wall
41 bottles of beer
Take one down.
Pass it around.
40 bottles of beer on the wall
40 bottles of beer on the wall
40 bottles of beer
Take one down.
Pass it around.
39 bottles of beer on the wall
39 bottles of beer on the wall
39 bottles of beer
Take one down.
Pass it around.
38 bottles of beer on the wall
38 bottles of beer on the wall
38 bottles of beer
Take one down.
Pass it around.
37 bottles of beer on the wall
37 bottles of beer on the wall
37 bottles of beer
Take one down.
Pass it around.
36 bottles of beer on the wall
36 bottles of beer on the wall
36 bottles of beer
Take one down.
Pass it around.
35 bottles of beer on the wall
35 bottles of beer on the wall
35 bottles of beer
Take one down.
Pass it around.
34 bottles of beer on the wall
34 bottles of beer on the wall
34 bottles of beer
Take one down.
Pass it around.
33 bottles of beer on the wall
33 bottles of beer on the wall
33 bottles of beer
Take one down.
Pass it around.
32 bottles of beer on the wall
32 bottles of beer on the wall
32 bottles of beer
Take one down.
Pass it around.
31 bottles of beer on the wall
31 bottles of beer on the wall
31 bottles of beer
Take one down.
Pass it around.
30 bottles of beer on the wall
30 bottles of beer on the wall
30 bottles of beer
Take one down.
Pass it around.
29 bottles of beer on the wall
29 bottles of beer on the wall
29 bottles of beer
Take one down.
Pass it around.
28 bottles of beer on the wall
28 bottles of beer on the wall
28 bottles of beer
Take one down.
Pass it around.
27 bottles of beer on the wall
27 bottles of beer on the wall
27 bottles of beer
Take one down.
Pass it around.
26 bottles of beer on the wall
26 bottles of beer on the wall
26 bottles of beer
Take one down.
Pass it around.
25 bottles of beer on the wall
25 bottles of beer on the wall
25 bottles of beer
Take one down.
Pass it around.
24 bottles of beer on the wall
24 bottles of beer on the wall
24 bottles of beer
Take one down.
Pass it around.
23 bottles of beer on the wall
23 bottles of beer on the wall
23 bottles of beer
Take one down.
Pass it around.
22 bottles of beer on the wall
22 bottles of beer on the wall
22 bottles of beer
Take one down.
Pass it around.
21 bottles of beer on the wall
21 bottles of beer on the wall
21 bottles of beer
Take one down.
Pass it around.
20 bottles of beer on the wall
20 bottles of beer on the wall
20 bottles of beer
Take one down.
Pass it around.
19 bottles of beer on the wall
19 bottles of beer on the wall
19 bottles of beer
Take one down.
Pass it around.
18 bottles of beer on the wall
18 bottles of beer on the wall
18 bottles of beer
Take one down.
Pass it around.
17 bottles of beer on the wall
17 bottles of beer on the wall
17 bottles of beer
Take one down.
Pass it around.
16 bottles of beer on the wall
16 bottles of beer on the wall
16 bottles of beer
Take one down.
Pass it around.
15 bottles of beer on the wall
15 bottles of beer on the wall
15 bottles of beer
Take one down.
Pass it around.
14 bottles of beer on the wall
14 bottles of beer on the wall
14 bottles of beer
Take one down.
Pass it around.
13 bottles of beer on the wall
13 bottles of beer on the wall
13 bottles of beer
Take one down.
Pass it around.
12 bottles of beer on the wall
12 bottles of beer on the wall
12 bottles of beer
Take one down.
Pass it around.
11 bottles of beer on the wall
11 bottles of beer on the wall
11 bottles of beer
Take one down.
Pass it around.
10 bottles of beer on the wall
10 bottles of beer on the wall
10 bottles of beer
Take one down.
Pass it around.
9 bottles of beer on the wall
9 bottles of beer on the wall
9 bottles of beer
Take one down.
Pass it around.
8 bottles of beer on the wall
8 bottles of beer on the wall
8 bottles of beer
Take one down.
Pass it around.
7 bottles of beer on the wall
7 bottles of beer on the wall
7 bottles of beer
Take one down.
Pass it around.
6 bottles of beer on the wall
6 bottles of beer on the wall
6 bottles of beer
Take one down.
Pass it around.
5 bottles of beer on the wall
5 bottles of beer on the wall
5 bottles of beer
Take one down.
Pass it around.
4 bottles of beer on the wall
4 bottles of beer on the wall
4 bottles of beer
Take one down.
Pass it around.
3 bottles of beer on the wall
3 bottles of beer on the wall
3 bottles of beer
Take one down.
Pass it around.
2 bottles of beer on the wall
2 bottles of beer on the wall
2 bottles of beer
Take one down.
Pass it around.
1 bottles of beer on the wall
1 bottle of beer on the wall
1 bottle of beer
Take one down.
Pass it around.
No more bottles of beer on the wall
Press any key to continue . . .

据我所知，输出的代码应该以

开头

99 bottles of beer

因为int beerNum = 99;

谁能解释一下为什么我的输出高于

60 bottles of beer

提前致谢。如果有人向我解释这一点，我会非常满意。

Answer 1

您的界面可能刚刚切断了输出的顶部，或者您可能没有向上滚动。上面的代码对我有用。

Answer 2

它实际上正在输出您期望的值，最可能的问题是您的输出 window 正在将输出削减到顶部。

NetBeans 上的以下输出：

run:
99 bottles of beer on the wall
99 bottles of beer Take one down
    .
Pass it around.
98 bottles of beer on the wall
98 bottles of beer on the wall
98 bottles of beer Take one down
    .
Pass it around.
97 bottles of beer on the wall
97 bottles of beer on the wall
97 bottles of beer Take one down
    .
Pass it around.
96 bottles of beer on the wall
96 bottles of beer on the wall
96 bottles of beer Take one down
    .
Pass it around.
95 bottles of beer on the wall
95 bottles of beer on the wall
95 bottles of beer Take one down
    .
Pass it around.
94 bottles of beer on the wall
94 bottles of beer on the wall
94 bottles of beer Take one down
    .
Pass it around.
93 bottles of beer on the wall
93 bottles of beer on the wall
93 bottles of beer Take one down
    .
Pass it around.
92 bottles of beer on the wall
92 bottles of beer on the wall
92 bottles of beer Take one down
    .
Pass it around.
91 bottles of beer on the wall
91 bottles of beer on the wall
91 bottles of beer Take one down
    .
Pass it around.
90 bottles of beer on the wall
90 bottles of beer on the wall
90 bottles of beer Take one down
    .
Pass it around.
89 bottles of beer on the wall
89 bottles of beer on the wall
89 bottles of beer Take one down
    .
Pass it around.
88 bottles of beer on the wall
88 bottles of beer on the wall
88 bottles of beer Take one down
    .
Pass it around.
87 bottles of beer on the wall
87 bottles of beer on the wall
87 bottles of beer Take one down
    .
Pass it around.
86 bottles of beer on the wall
86 bottles of beer on the wall
86 bottles of beer Take one down
    .
Pass it around.
85 bottles of beer on the wall
85 bottles of beer on the wall
85 bottles of beer Take one down
    .
Pass it around.
84 bottles of beer on the wall
84 bottles of beer on the wall
84 bottles of beer Take one down
    .
Pass it around.
83 bottles of beer on the wall
83 bottles of beer on the wall
83 bottles of beer Take one down
    .
Pass it around.
82 bottles of beer on the wall
82 bottles of beer on the wall
82 bottles of beer Take one down
    .
Pass it around.
81 bottles of beer on the wall
81 bottles of beer on the wall
81 bottles of beer Take one down
    .
Pass it around.
80 bottles of beer on the wall
80 bottles of beer on the wall
80 bottles of beer Take one down
    .
Pass it around.
79 bottles of beer on the wall
79 bottles of beer on the wall
79 bottles of beer Take one down
    .
Pass it around.
78 bottles of beer on the wall
78 bottles of beer on the wall
78 bottles of beer Take one down
    .
Pass it around.
77 bottles of beer on the wall
77 bottles of beer on the wall
77 bottles of beer Take one down
    .
Pass it around.
76 bottles of beer on the wall
76 bottles of beer on the wall
76 bottles of beer Take one down
    .
Pass it around.
75 bottles of beer on the wall
75 bottles of beer on the wall
75 bottles of beer Take one down
    .
Pass it around.
74 bottles of beer on the wall
74 bottles of beer on the wall
74 bottles of beer Take one down
    .
Pass it around.
73 bottles of beer on the wall
73 bottles of beer on the wall
73 bottles of beer Take one down
    .
Pass it around.
72 bottles of beer on the wall
72 bottles of beer on the wall
72 bottles of beer Take one down
    .
Pass it around.
71 bottles of beer on the wall
71 bottles of beer on the wall
71 bottles of beer Take one down
    .
Pass it around.
70 bottles of beer on the wall
70 bottles of beer on the wall
70 bottles of beer Take one down
    .
Pass it around.
69 bottles of beer on the wall
69 bottles of beer on the wall
69 bottles of beer Take one down
    .
Pass it around.
68 bottles of beer on the wall
68 bottles of beer on the wall
68 bottles of beer Take one down
    .
Pass it around.
67 bottles of beer on the wall
67 bottles of beer on the wall
67 bottles of beer Take one down
    .
Pass it around.
66 bottles of beer on the wall
66 bottles of beer on the wall
66 bottles of beer Take one down
    .
Pass it around.
65 bottles of beer on the wall
65 bottles of beer on the wall
65 bottles of beer Take one down
    .
Pass it around.
64 bottles of beer on the wall
64 bottles of beer on the wall
64 bottles of beer Take one down
    .
Pass it around.
63 bottles of beer on the wall
63 bottles of beer on the wall
63 bottles of beer Take one down
    .
Pass it around.
62 bottles of beer on the wall
62 bottles of beer on the wall
62 bottles of beer Take one down
    .
Pass it around.
61 bottles of beer on the wall
61 bottles of beer on the wall
61 bottles of beer Take one down
    .
Pass it around.
60 bottles of beer on the wall
60 bottles of beer on the wall
60 bottles of beer Take one down
    .
Pass it around.
59 bottles of beer on the wall
59 bottles of beer on the wall
59 bottles of beer Take one down
    .
Pass it around.
58 bottles of beer on the wall
58 bottles of beer on the wall
58 bottles of beer Take one down
    .
Pass it around.
57 bottles of beer on the wall
57 bottles of beer on the wall
57 bottles of beer Take one down
    .
Pass it around.
56 bottles of beer on the wall
56 bottles of beer on the wall
56 bottles of beer Take one down
    .
Pass it around.
55 bottles of beer on the wall
55 bottles of beer on the wall
55 bottles of beer Take one down
    .
Pass it around.
54 bottles of beer on the wall
54 bottles of beer on the wall
54 bottles of beer Take one down
    .
Pass it around.
53 bottles of beer on the wall
53 bottles of beer on the wall
53 bottles of beer Take one down
    .
Pass it around.
52 bottles of beer on the wall
52 bottles of beer on the wall
52 bottles of beer Take one down
    .
Pass it around.
51 bottles of beer on the wall
51 bottles of beer on the wall
51 bottles of beer Take one down
    .
Pass it around.
50 bottles of beer on the wall
50 bottles of beer on the wall
50 bottles of beer Take one down
    .
Pass it around.
49 bottles of beer on the wall
49 bottles of beer on the wall
49 bottles of beer Take one down
    .
Pass it around.
48 bottles of beer on the wall
48 bottles of beer on the wall
48 bottles of beer Take one down
    .
Pass it around.
47 bottles of beer on the wall
47 bottles of beer on the wall
47 bottles of beer Take one down
    .
Pass it around.
46 bottles of beer on the wall
46 bottles of beer on the wall
46 bottles of beer Take one down
    .
Pass it around.
45 bottles of beer on the wall
45 bottles of beer on the wall
45 bottles of beer Take one down
    .
Pass it around.
44 bottles of beer on the wall
44 bottles of beer on the wall
44 bottles of beer Take one down
    .
Pass it around.
43 bottles of beer on the wall
43 bottles of beer on the wall
43 bottles of beer Take one down
    .
Pass it around.
42 bottles of beer on the wall
42 bottles of beer on the wall
42 bottles of beer Take one down
    .
Pass it around.
41 bottles of beer on the wall
41 bottles of beer on the wall
41 bottles of beer Take one down
    .
Pass it around.
40 bottles of beer on the wall
40 bottles of beer on the wall
40 bottles of beer Take one down
    .
Pass it around.
39 bottles of beer on the wall
39 bottles of beer on the wall
39 bottles of beer Take one down
    .
Pass it around.
38 bottles of beer on the wall
38 bottles of beer on the wall
38 bottles of beer Take one down
    .
Pass it around.
37 bottles of beer on the wall
37 bottles of beer on the wall
37 bottles of beer Take one down
    .
Pass it around.
36 bottles of beer on the wall
36 bottles of beer on the wall
36 bottles of beer Take one down
    .
Pass it around.
35 bottles of beer on the wall
35 bottles of beer on the wall
35 bottles of beer Take one down
    .
Pass it around.
34 bottles of beer on the wall
34 bottles of beer on the wall
34 bottles of beer Take one down
    .
Pass it around.
33 bottles of beer on the wall
33 bottles of beer on the wall
33 bottles of beer Take one down
    .
Pass it around.
32 bottles of beer on the wall
32 bottles of beer on the wall
32 bottles of beer Take one down
    .
Pass it around.
31 bottles of beer on the wall
31 bottles of beer on the wall
31 bottles of beer Take one down
    .
Pass it around.
30 bottles of beer on the wall
30 bottles of beer on the wall
30 bottles of beer Take one down
    .
Pass it around.
29 bottles of beer on the wall
29 bottles of beer on the wall
29 bottles of beer Take one down
    .
Pass it around.
28 bottles of beer on the wall
28 bottles of beer on the wall
28 bottles of beer Take one down
    .
Pass it around.
27 bottles of beer on the wall
27 bottles of beer on the wall
27 bottles of beer Take one down
    .
Pass it around.
26 bottles of beer on the wall
26 bottles of beer on the wall
26 bottles of beer Take one down
    .
Pass it around.
25 bottles of beer on the wall
25 bottles of beer on the wall
25 bottles of beer Take one down
    .
Pass it around.
24 bottles of beer on the wall
24 bottles of beer on the wall
24 bottles of beer Take one down
    .
Pass it around.
23 bottles of beer on the wall
23 bottles of beer on the wall
23 bottles of beer Take one down
    .
Pass it around.
22 bottles of beer on the wall
22 bottles of beer on the wall
22 bottles of beer Take one down
    .
Pass it around.
21 bottles of beer on the wall
21 bottles of beer on the wall
21 bottles of beer Take one down
    .
Pass it around.
20 bottles of beer on the wall
20 bottles of beer on the wall
20 bottles of beer Take one down
    .
Pass it around.
19 bottles of beer on the wall
19 bottles of beer on the wall
19 bottles of beer Take one down
    .
Pass it around.
18 bottles of beer on the wall
18 bottles of beer on the wall
18 bottles of beer Take one down
    .
Pass it around.
17 bottles of beer on the wall
17 bottles of beer on the wall
17 bottles of beer Take one down
    .
Pass it around.
16 bottles of beer on the wall
16 bottles of beer on the wall
16 bottles of beer Take one down
    .
Pass it around.
15 bottles of beer on the wall
15 bottles of beer on the wall
15 bottles of beer Take one down
    .
Pass it around.
14 bottles of beer on the wall
14 bottles of beer on the wall
14 bottles of beer Take one down
    .
Pass it around.
13 bottles of beer on the wall
13 bottles of beer on the wall
13 bottles of beer Take one down
    .
Pass it around.
12 bottles of beer on the wall
12 bottles of beer on the wall
12 bottles of beer Take one down
    .
Pass it around.
11 bottles of beer on the wall
11 bottles of beer on the wall
11 bottles of beer Take one down
    .
Pass it around.
10 bottles of beer on the wall
10 bottles of beer on the wall
10 bottles of beer Take one down
    .
Pass it around.
9 bottles of beer on the wall
9 bottles of beer on the wall
9 bottles of beer Take one down
    .
Pass it around.
8 bottles of beer on the wall
8 bottles of beer on the wall
8 bottles of beer Take one down
    .
Pass it around.
7 bottles of beer on the wall
7 bottles of beer on the wall
7 bottles of beer Take one down
    .
Pass it around.
6 bottles of beer on the wall
6 bottles of beer on the wall
6 bottles of beer Take one down
    .
Pass it around.
5 bottles of beer on the wall
5 bottles of beer on the wall
5 bottles of beer Take one down
    .
Pass it around.
4 bottles of beer on the wall
4 bottles of beer on the wall
4 bottles of beer Take one down
    .
Pass it around.
3 bottles of beer on the wall
3 bottles of beer on the wall
3 bottles of beer Take one down
    .
Pass it around.
2 bottles of beer on the wall
2 bottles of beer on the wall
2 bottles of beer Take one down
    .
Pass it around.
1 bottles of beer on the wall
1 bottle of beer on the wall
1 bottle of beer Take one down
    .
Pass it around.No more bottles of beer on the wall

尝试检查将 while (beerNum > 0) 更改为 while (beerNum > 50) 之类的内容，这样它就不会产生太多输出。

Answer 3

您是对的，因为代码实际上会输出“99 瓶啤酒……等等”。

Answer 4

这可能是因为您 IDE 中的输出控制台缓冲区已达到，因此仅显示控制台限制内的输出。

如果你用的是eclipse那么 1.转到eclipse首选项 2.搜索控制台 3.去掉勾选"Limit console output"

其他

只需将 beerNum 更改为某个较小的值（即小于 50），您将看到完整的输出

Answer 5

是的，输出应该以

99 bottles of beer

您的代码没有任何问题。正如您所说，您使用 Geany 作为 IDE。 Geany 使用命令行显示输出。如果您使用 eclipse 或 netbeans，您将获得您想象的正确输出。

eclipse 输出 -

99 bottles of beer on the wall
99 bottles of beer
Take one down.
Pass it around.
98 bottles of beer on the wall
98 bottles of beer on the wall
98 bottles of beer
Take one down.
Pass it around.
97 bottles of beer on the wall
97 bottles of beer on the wall
97 bottles of beer
Take one down.
Pass it around.
96 bottles of beer on the wall
96 bottles of beer on the wall
96 bottles of beer
Take one down.
Pass it around.
95 bottles of beer on the wall
95 bottles of beer on the wall
95 bottles of beer
Take one down.
Pass it around.
94 bottles of beer on the wall
94 bottles of beer on the wall
94 bottles of beer
Take one down.
Pass it around.
93 bottles of beer on the wall
93 bottles of beer on the wall
93 bottles of beer
Take one down.
Pass it around.
92 bottles of beer on the wall
92 bottles of beer on the wall
92 bottles of beer
Take one down.
Pass it around.
91 bottles of beer on the wall
91 bottles of beer on the wall
91 bottles of beer
Take one down.
Pass it around.
90 bottles of beer on the wall
90 bottles of beer on the wall
90 bottles of beer
Take one down.
Pass it around.
89 bottles of beer on the wall
89 bottles of beer on the wall
89 bottles of beer
Take one down.
Pass it around.
88 bottles of beer on the wall
88 bottles of beer on the wall
88 bottles of beer
Take one down.
Pass it around.
87 bottles of beer on the wall
87 bottles of beer on the wall
87 bottles of beer
Take one down.
Pass it around.
86 bottles of beer on the wall
86 bottles of beer on the wall
86 bottles of beer
Take one down.
Pass it around.
85 bottles of beer on the wall
85 bottles of beer on the wall
85 bottles of beer
Take one down.
Pass it around.
84 bottles of beer on the wall
84 bottles of beer on the wall
84 bottles of beer
Take one down.
Pass it around.
83 bottles of beer on the wall
83 bottles of beer on the wall
83 bottles of beer
Take one down.
Pass it around.
82 bottles of beer on the wall
82 bottles of beer on the wall
82 bottles of beer
Take one down.
Pass it around.
81 bottles of beer on the wall
81 bottles of beer on the wall
81 bottles of beer
Take one down.
Pass it around.
80 bottles of beer on the wall
80 bottles of beer on the wall
80 bottles of beer
Take one down.
Pass it around.
79 bottles of beer on the wall
79 bottles of beer on the wall
79 bottles of beer
Take one down.
Pass it around.
78 bottles of beer on the wall
78 bottles of beer on the wall
78 bottles of beer
Take one down.
Pass it around.
77 bottles of beer on the wall
77 bottles of beer on the wall
77 bottles of beer
Take one down.
Pass it around.
76 bottles of beer on the wall
76 bottles of beer on the wall
76 bottles of beer
Take one down.
Pass it around.
75 bottles of beer on the wall
75 bottles of beer on the wall
75 bottles of beer
Take one down.
Pass it around.
74 bottles of beer on the wall
74 bottles of beer on the wall
74 bottles of beer
Take one down.
Pass it around.
73 bottles of beer on the wall
73 bottles of beer on the wall
73 bottles of beer
Take one down.
Pass it around.
72 bottles of beer on the wall
72 bottles of beer on the wall
72 bottles of beer
Take one down.
Pass it around.
71 bottles of beer on the wall
71 bottles of beer on the wall
71 bottles of beer
Take one down.
Pass it around.
70 bottles of beer on the wall
70 bottles of beer on the wall
70 bottles of beer
Take one down.
Pass it around.
69 bottles of beer on the wall
69 bottles of beer on the wall
69 bottles of beer
Take one down.
Pass it around.
68 bottles of beer on the wall
68 bottles of beer on the wall
68 bottles of beer
Take one down.
Pass it around.
67 bottles of beer on the wall
67 bottles of beer on the wall
67 bottles of beer
Take one down.
Pass it around.
66 bottles of beer on the wall
66 bottles of beer on the wall
66 bottles of beer
Take one down.
Pass it around.
65 bottles of beer on the wall
65 bottles of beer on the wall
65 bottles of beer
Take one down.
Pass it around.
64 bottles of beer on the wall
64 bottles of beer on the wall
64 bottles of beer
Take one down.
Pass it around.
63 bottles of beer on the wall
63 bottles of beer on the wall
63 bottles of beer
Take one down.
Pass it around.
62 bottles of beer on the wall
62 bottles of beer on the wall
62 bottles of beer
Take one down.
Pass it around.
61 bottles of beer on the wall
61 bottles of beer on the wall
61 bottles of beer
Take one down.
Pass it around.
60 bottles of beer on the wall
60 bottles of beer on the wall
60 bottles of beer
Take one down.
Pass it around.
59 bottles of beer on the wall
59 bottles of beer on the wall
59 bottles of beer
Take one down.
Pass it around.
58 bottles of beer on the wall
58 bottles of beer on the wall
58 bottles of beer
Take one down.
Pass it around.
57 bottles of beer on the wall
57 bottles of beer on the wall
57 bottles of beer
Take one down.
Pass it around.
56 bottles of beer on the wall
56 bottles of beer on the wall
56 bottles of beer
Take one down.
Pass it around.
55 bottles of beer on the wall
55 bottles of beer on the wall
55 bottles of beer
Take one down.
Pass it around.
54 bottles of beer on the wall
54 bottles of beer on the wall
54 bottles of beer
Take one down.
Pass it around.
53 bottles of beer on the wall
53 bottles of beer on the wall
53 bottles of beer
Take one down.
Pass it around.
52 bottles of beer on the wall
52 bottles of beer on the wall
52 bottles of beer
Take one down.
Pass it around.
51 bottles of beer on the wall
51 bottles of beer on the wall
51 bottles of beer
Take one down.
Pass it around.
50 bottles of beer on the wall
50 bottles of beer on the wall
50 bottles of beer
Take one down.
Pass it around.
49 bottles of beer on the wall
49 bottles of beer on the wall
49 bottles of beer
Take one down.
Pass it around.
48 bottles of beer on the wall
48 bottles of beer on the wall
48 bottles of beer
Take one down.
Pass it around.
47 bottles of beer on the wall
47 bottles of beer on the wall
47 bottles of beer
Take one down.
Pass it around.
46 bottles of beer on the wall
46 bottles of beer on the wall
46 bottles of beer
Take one down.
Pass it around.
45 bottles of beer on the wall
45 bottles of beer on the wall
45 bottles of beer
Take one down.
Pass it around.
44 bottles of beer on the wall
44 bottles of beer on the wall
44 bottles of beer
Take one down.
Pass it around.
43 bottles of beer on the wall
43 bottles of beer on the wall
43 bottles of beer
Take one down.
Pass it around.
42 bottles of beer on the wall
42 bottles of beer on the wall
42 bottles of beer
Take one down.
Pass it around.
41 bottles of beer on the wall
41 bottles of beer on the wall
41 bottles of beer
Take one down.
Pass it around.
40 bottles of beer on the wall
40 bottles of beer on the wall
40 bottles of beer
Take one down.
Pass it around.
39 bottles of beer on the wall
39 bottles of beer on the wall
39 bottles of beer
Take one down.
Pass it around.
38 bottles of beer on the wall
38 bottles of beer on the wall
38 bottles of beer
Take one down.
Pass it around.
37 bottles of beer on the wall
37 bottles of beer on the wall
37 bottles of beer
Take one down.
Pass it around.
36 bottles of beer on the wall
36 bottles of beer on the wall
36 bottles of beer
Take one down.
Pass it around.
35 bottles of beer on the wall
35 bottles of beer on the wall
35 bottles of beer
Take one down.
Pass it around.
34 bottles of beer on the wall
34 bottles of beer on the wall
34 bottles of beer
Take one down.
Pass it around.
33 bottles of beer on the wall
33 bottles of beer on the wall
33 bottles of beer
Take one down.
Pass it around.
32 bottles of beer on the wall
32 bottles of beer on the wall
32 bottles of beer
Take one down.
Pass it around.
31 bottles of beer on the wall
31 bottles of beer on the wall
31 bottles of beer
Take one down.
Pass it around.
30 bottles of beer on the wall
30 bottles of beer on the wall
30 bottles of beer
Take one down.
Pass it around.
29 bottles of beer on the wall
29 bottles of beer on the wall
29 bottles of beer
Take one down.
Pass it around.
28 bottles of beer on the wall
28 bottles of beer on the wall
28 bottles of beer
Take one down.
Pass it around.
27 bottles of beer on the wall
27 bottles of beer on the wall
27 bottles of beer
Take one down.
Pass it around.
26 bottles of beer on the wall
26 bottles of beer on the wall
26 bottles of beer
Take one down.
Pass it around.
25 bottles of beer on the wall
25 bottles of beer on the wall
25 bottles of beer
Take one down.
Pass it around.
24 bottles of beer on the wall
24 bottles of beer on the wall
24 bottles of beer
Take one down.
Pass it around.
23 bottles of beer on the wall
23 bottles of beer on the wall
23 bottles of beer
Take one down.
Pass it around.
22 bottles of beer on the wall
22 bottles of beer on the wall
22 bottles of beer
Take one down.
Pass it around.
21 bottles of beer on the wall
21 bottles of beer on the wall
21 bottles of beer
Take one down.
Pass it around.
20 bottles of beer on the wall
20 bottles of beer on the wall
20 bottles of beer
Take one down.
Pass it around.
19 bottles of beer on the wall
19 bottles of beer on the wall
19 bottles of beer
Take one down.
Pass it around.
18 bottles of beer on the wall
18 bottles of beer on the wall
18 bottles of beer
Take one down.
Pass it around.
17 bottles of beer on the wall
17 bottles of beer on the wall
17 bottles of beer
Take one down.
Pass it around.
16 bottles of beer on the wall
16 bottles of beer on the wall
16 bottles of beer
Take one down.
Pass it around.
15 bottles of beer on the wall
15 bottles of beer on the wall
15 bottles of beer
Take one down.
Pass it around.
14 bottles of beer on the wall
14 bottles of beer on the wall
14 bottles of beer
Take one down.
Pass it around.
13 bottles of beer on the wall
13 bottles of beer on the wall
13 bottles of beer
Take one down.
Pass it around.
12 bottles of beer on the wall
12 bottles of beer on the wall
12 bottles of beer
Take one down.
Pass it around.
11 bottles of beer on the wall
11 bottles of beer on the wall
11 bottles of beer
Take one down.
Pass it around.
10 bottles of beer on the wall
10 bottles of beer on the wall
10 bottles of beer
Take one down.
Pass it around.
9 bottles of beer on the wall
9 bottles of beer on the wall
9 bottles of beer
Take one down.
Pass it around.
8 bottles of beer on the wall
8 bottles of beer on the wall
8 bottles of beer
Take one down.
Pass it around.
7 bottles of beer on the wall
7 bottles of beer on the wall
7 bottles of beer
Take one down.
Pass it around.
6 bottles of beer on the wall
6 bottles of beer on the wall
6 bottles of beer
Take one down.
Pass it around.
5 bottles of beer on the wall
5 bottles of beer on the wall
5 bottles of beer
Take one down.
Pass it around.
4 bottles of beer on the wall
4 bottles of beer on the wall
4 bottles of beer
Take one down.
Pass it around.
3 bottles of beer on the wall
3 bottles of beer on the wall
3 bottles of beer
Take one down.
Pass it around.
2 bottles of beer on the wall
2 bottles of beer on the wall
2 bottles of beer
Take one down.
Pass it around.
1 bottles of beer on the wall
1 bottle of beer on the wall
1 bottle of beer
Take one down.
Pass it around.
No more bottles of beer on the wall

对输出感到困惑

Confusing about the output

oop

while-loop