更新

作业/刘航宇-day44/第三题/P2969.java

@@ -0,0 +1,17 @@
+import java.util.*;
+
+public class P2969 {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        int n = in.nextInt();
+        for (int i = 0; i < n; i++) {
+            int stars = i <= n / 2 ? (2 * i + 1) : (2 * (n - i - 1) + 1);
+            int spaces = (n - stars) / 2;
+            StringBuilder row = new StringBuilder();
+            for (int s = 0; s < spaces; s++) row.append(' ');
+            for (int k = 0; k < stars; k++) row.append('*');
+            System.out.println(row.toString());
+        }
+        in.close();
+    }
+}