8-4

代码说明：

  编写一个程序，新建一个文件：d:abc.txt,从键盘输入文件的内容（不超过100个字符）。然后新建一个文件：d:def.txt,将d:abc.txt文件的内容复制到d:def.txt。(Write a program to create a new file of organization: d: abc.txt, contents of the file from the keyboard input (not more than 100 characters). Then create a new file: d: def.txt, d: abc.txt file copied to d: def.txt.)