4位的吸血鬼数字计算的JAVA代码

1 public class Xixueguinumber
2 {
3
4     public int cal(int x, int y, int z, int w)
5     {
6         int num = (x * 10 + y) * (z * 10 + w);
7         return num;
8
9     }
10     public static void main(String[] args)
11