Java输出金字塔

阳光穿透心脏的1/2处 2022-09-16 14:16 145阅读 0赞

1.  雪花形状金字塔

public static void main(String[] args) {
        
            int i, j, k, n;
            Scanner sc = new Scanner(System.in);
            System.out.print("请输入金字塔层数：");
            n = sc.nextInt();
            //外层循环控制层数
            for (i = 1; i <= n; i++) {
        
                //根据外层行号，输出星号左边的空格
                for (j = 1; j <= n - i; j++) {
        
                    System.out.printf(" ");
                }
                //根据外层行号，输出星号个数
                for (k = 1; k <= 2 * i - 1; k++) {
        
                    System.out.print("*");
                }
                //一行结束，换行
                System.out.print("\n");
            }
        }

运行结果：  
![在这里插入图片描述][f443c10b0217474181c63fadb1746af9.png]  
2. 数字增加形状的金字塔

public static void main(String[] args) {
        
            int n;
            Scanner sc = new Scanner(System.in);
            System.out.print("请输入金字塔层数：");
            n = sc.nextInt();
            for (int i = 1; i <= n; i++) {
        
                for (int j = i; j < n; j++) {
        
                    System.out.print("\t");
                }
                for (int j = i; j >= 1; j--) {
        
                    System.out.print(j + "\t");
                }
                for (int j = 2; j <= i; j++) {
        
                    System.out.print(j + "\t");
                }
                System.out.println();
            }
        }

运行结果：  
![在这里插入图片描述][345a9d90839a4a29b78a2e4e54affe71.png]

[f443c10b0217474181c63fadb1746af9.png]: /images/20220828/45ee17fc74764e198ddcb6fa0476dd67.png
[345a9d90839a4a29b78a2e4e54affe71.png]: /images/20220828/5ebb39f5911d4662a9992c80a12641fc.png