我如何使这个多维度数组打印相反的数字

Question

So basically this Java program prints

43 
39 
71

But I have to make it print

17 
93 
34

Currently I'm having a bit of trouble understanding it, if someone could show me a step by step on how to do this it would help a lot.

   int a[][] = {{4,2,7}, {3,9,1}};
   int j,i;
   for(i = 0; i < a[0].length; i++)
   {
       for(j = 0; j < a.length; j++)
       System.out.print(a[j][i]);
       System.out.println();
   }

Answer 1

Just reverse the order of the loops.

int a[][] = {{4,2,7},
            {3,9,1}};
int j,i;
for(i = a[0].length - 1; i >= 0; i--)
{
    for(j = a.length - 1; j >= 0; j--)
        System.out.print(a[j][i]);
    System.out.println();
}

Answer 2

您可以简单地反转循环。