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 length of audible sound (point made its short, fat, long dash sound).