jiugongge.java

关于一些算法的例子

public class JiuGongGe{
	//九宫格的java程序
	public static void main(String args[]){
		int n = 5;

		int[][] a = new int[n][n];

		int row = 0;
		int col = n/2;
		a[row][col] = 1;

		for(int i = 2; i<= n*n; ++i){
			col++;
			row--;

			if ( (col >= a.length) && (row < 0) ){
				row += 2;
				col -- ;
			}else if(col >= a.length){
				col = 0;
			}else if(row < 0){
				row = a.length -1;
			}else if(a[row][col] != 0){
				row += 2;
				col --;
			}

			a[row][col] = i;
		}

		print(a);
	}

	public static void print(int[][] a){
		for(int i = 0; i<a.length; ++i){
			for (int j = 0; j<a[i].length; ++j){
				System.out.print(a[i][j] + "\t");
			}
			System.out.println();
		}
	}
}