探讨指针与字符串的关系。编辑、注释、运行、调试自己编写的程序.

请编写一个程序， 有一字符串， 包含n个字符。使用指针，将此字符串从第ｍ 个字符开始的全部字符复制成为另一个字符串。

-Explore the relationship between the pointer and string. Edit, annotate, run, debug, write your own programs., Please write a program, there is a string containing n characters. The use of pointers, all characters from this string of characters beginning of the m-th copy become another string.