Question

java程序:通过嵌套for循环，输出平躺的空心菱形。（在线等）

Answer 1

public class Tmp{
    public static void main(String[] args){
        int n=11;
        int mid=n/2+1;
        int i=0,j=0;
        char[][] array=new char[20][20];
        for(i=0;i<mid;i++){
            for(j=0;j<=12;j++){
                if(j==mid+i||j==mid-i)
                {
                    //System.out.print("*");
                    array[i][j]='*';
                }
                else
                {
                    //System.out.print(" ");
                    array[i][j]=' ';
                }
            }
            //System.out.println("");
        }
        for(i=0;i<mid;i++){
            for(j=0;j<=12;j++){
                System.out.print(array[i][j]);
            }
            System.out.println("");
        }
        for(i=mid-2;i>=0;i--){
            for(j=0;j<=12;j++){
                System.out.print(array[i][j]);
            }
            System.out.println("");
        }
    }
}