具体代码如下:
import java.math.*;
public class Test
{
private int[][] a = new int[5][5];
public void getA()
{
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
a[i][j] = (int)(Math.random() * 10);
}
}
}
public void getSum()
{
int zdj=0,fdj=0,zb=0;//分别是主对角 负对角 周边
getA();
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
System.out.printf ("%d ",a[i][j]);
if(i==0 || i==4)
{
zb += a[i][j];
}
else
{
if(j==0 || j==4)
{
zb += a[i][j];
}
}
if(j == i)
{
zdj += a[i][j];
}
if((i+j == 4))
{
fdj += a[i][j];
}
}
System.out.println ();
}
System.out.println ("主对角线的和:"+zdj);
System.out.println ("负对角线的和:"+fdj);
System.out.println ("周边之和:"+zb);
}
public static void main(String[] args)
{
Test t = new Test();
t.getSum();
}
}
运行结果如下:
0 3 4 8 7
8 9 7 5 6
1 1 8 5 5
3 5 5 1 7
8 7 2 4 5
主对角线的和:23
负对角线的和:33
周边之和:78
