array_x

import java.util.*;
public class array_x
{
	public static void main(String args[])
	{
		int a[][]={{2,4,5},{7,9,10},{12,15,17}};
		int key=0;
		boolean g=false;
		Scanner reader= new Scanner(System.in);
		System.out.printf("输入一个数字\n");
		key = reader.nextInt();
		
		for(int k=0; k<3; k++)
			for(int j=0; j<3; j++)
				if(key==a[k][j]) 
				{
					System.out.printf("a[%d][%d]== %d ==key",k,j,a[k][j]);
					g=true;
				}
		if(g==false) System.out.printf("不在数组中\n");
	}
}