我想编写如下程序：1、定义一个包含26个小写字母的数组2、请用户输入0-25之间的自然数3、alert对话框显示输入自然数作为索引对应的字母代码如下：我基础知识欠缺，这段代码不能运行；请高手指点错误；如果能让这段代码正常运行，下一步我想编写一段加密的小程序，即用户输入字符串，程序把字符串中的每个字母按某种规则重写输出（比如每个字母按字母表顺序向后移动3位输出）

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更新时间 2024-09-04 12:12:43

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