圣诞即来，一颗打印的圣诞树给程屌。

 Java代码

1. import java.util.Scanner;
2.  
3. public class Christ {
4.  
5. /**
6. * @param args
7. */
8. public static void main(String[] args) {
9. // TODO Auto-generated method stub
10. Christ temp = new Christ();
11. System.out.println("请输入您需要的圣诞树的大小<数字>");
12. Scanner input = new Scanner(System.in);
13. int a = input.nextInt();
14. temp.ChristmasTree(2*a);
15. }
16.  
17.  
18. void ChristmasTree(int n) {
19. int i, j, k, m;
20. for (i = 1; i <= n / 2; i++) {
21. for (j = 1; j < n / 2 + i; j++) {
22. if (j <= n / 2 - i)
23. System.out.print(" ");
24. else {
25. if (j % 2 == 0)
26. System.out.print("*");
27. else
28. System.out.print("$");
29. }
30. }
31. System.out.print("\n");
32. }
33. for (k = n / 2 + 1; k <= n - n / 4; k++) {
34. for (m = 1; m <= n + 1; m++) {
35. if (m != n / 2)
36. System.out.print(" ");
37. else
38. System.out.print("||");
39. }
40. System.out.print("\n");
41. }
42.  
43. }
44.  
45. }  

转载于:https://blog.51cto.com/daheyuan/1136586