好好大们请快一点好好了

类似的思路做正方形就行了

//传入半径
public static void circle(int r){
         for (int y = 0; y <= 2 * r; y += 2) {//y的步长为2,改变y的步长可以将圆形变成椭圆  
            int x = (int)Math.round(r - Math.sqrt(2 * r * y - y * y));  
            int len = 2 * (r - x);  

            for (int i = 0; i <= x; i++) {  
                System.out.print(' ');  
            }
            System.out.print('*');  

            for (int j = 0; j <= len; j++) {  
                System.out.print(' ');  
            }  
            System.out.println('*');  

        } 
    }

4-2的话就写一个dog类里面写个方法接收参数骨头输出汪汪