两个难点 一: 将a-z小写字母转化为数字 二: 将大写字母转化为后一位小写字母 代码如下 //获取输入流 line = readline(); //新建两个字母、数字对照数组 const alphabets = ["abc", "def", "ghi", "jkl", "mno", "pqrs", "tuv", "wxyz"]; const num = [2, 3, 4, 5, 6, 7,&nb...