螺旋列印2D數組

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//一破題付出血的代價   多思考！
public static void offer(int [][]a){       int left=0,right=a.length-1,low=0,high=a[0].length-1;       while(low<=high){            for(int i=left;i<=right;i++){//123                System.out.print(a[left][i]+" ");            }            low++;           for(int i=low;i<=high;i++){//69               System.out.print(a[i][right]+" ");           }           right--;           for(int i=right;i>=left;i--){//87               System.out.print(a[high][i]+" ");           }           high--;           for(int i=high;i>=low;i--){//45               System.out.print(a[i][left]+" ");           }            left++;       }    }

 

螺旋列印2D數組