编写一个程序，读入一个由英文单词组成的文件1.txt，然后把它编码成摩尔斯码写入文件2.txt，同时，根据声音长短发声（点号发短音，破折号发长音）。-The preparation of a program, read a document composed of English words 1.txt, and then encoding it into Morse code into the file 2.txt, at the same time, according to the le