蓝桥杯 算法训练 ALGO-145 4-1打印下述图形

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4     public static void main(String[] args) {
 5         Scanner sc = new Scanner(System.in);
 6         int n = sc.nextInt();
 7         
 8         for(int i = 1; i <= n; i++){                //控制行
 9             for(int space = n-i ; space >= 1; space--){            //控制每行前边的空格
10                 System.out.print(" ");
11             }
12             for(int asterisk = 1 ; asterisk <= 2 * i - 1; asterisk++){    //控制每行的 * 
13                 System.out.print("*");
14             }
15             System.out.println();
16         }
17     }
18 }

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4 
 5     public static void main(String[] args) {
 6         Scanner sc = new Scanner(System.in);
 7         int n = sc.nextInt();
 8         
 9         String[][] triangle = new String[n][2*n-1];    //创建一个数组，初始化为空
10         for(int i = 0; i < n; i++) {
11             for(int j = 0; j < 2*n-1; j++) {
12                 triangle[i][j] = " ";
13             }
14         }
15         
16         int center = n-1;    //中心列号
17         for(int i = 0; i < n; i++) {        //控制行
18             for(int j = 0; j <= i ; j++) {    //每行在中心左右两边增加 i 个 *
19                 triangle[i][center-j] = "*";
20                 triangle[i][center+j] = "*";
21             }
22         }
23         //输出图形
24         for(int i = 0; i < n; i++) {
25             for(int j = 0; j < 2*n-1; j++) {
26                 System.out.print(triangle[i][j]);
27             }
28             System.out.print("\n");
29         }
30     }
31 }