1、遍历二维数组并求和。

 1
 2         int arr[][]=new int[][]{{12,8,45},{11,34,23,76}};
 3
 4          int sum = 0;
 5
 6          System.out.println("数组元素是:");
 7
 8          for (int c[]:arr)
 9    {
10         for (int b:c)
11         {
12              System.out.print(b+" ");
13
14              sum+=b;
15         }
16         System.out.println();
17    }
18
19         System.out.println("数组和为:"+sum);
20
21     }
22
23 }

数组元素是:
12 8 45
11 34 23 76
数组和为:209