实现字符串的ASCII码的十进制和十六进制转换。中英文提示，可以循环查询。结果输出到文本文件中保存。是计算机编程学习中一个有用工具。-Realize the ASCII code string and hexadecimal decimal conversion. Tips in both English and Chinese, you can cycle of inquiry. The results output to a text file saved. Learning compute