编程之美3.2 电话号码对应英语单词

此题很难，很难理解，强烈建议一步一步运行，然后再归纳总结体会
代码如下：

package com.qiyi.biwangshen;

public class Solution {

char[][] c = { {}, {}, { 'A', 'B', 'C' }, { 'D', 'E', 'F' }, { 'G', 'H', 'I' }, { 'J', 'K', 'L' },

{ 'M', 'N', 'O' }, { 'P', 'Q', 'R', 'S' }, { 'T', 'U', 'V' }, { 'W', 'X', 'Y', 'Z' } };

int[] total = { 0, 0, 3, 3, 3, 3, 3, 4, 3, 4 };

public void solution(int len, int[] number, int[] answer) {

while (true) {

for (int i = 0; i < len; i++) {

System.out.println(c[number[i]][answer[i]]);

}

int k = len - 1;

while (k >= 0) {

if (answer[k] < total[number[k]] - 1) {

answer[k]++;

break;

} else {

answer[k] = 0;

k--;

}

}

if (k < 0)

break;

}

}

}

package com.qiyi.biwangshen;

public class Main {

public static void main(String[] args) {

// TODO Auto-generated method stub

Solution solution = new Solution();

int[] number = {2,3,4};

int[] answer = {0,0,0};

int len = number.length;

solution.solution(len, number, answer);

}

}