4、　　用指针法编程，从键盘上输入多个字符串（每个串不超过5个字符且没有空格），用”*****”作为输入结束的标记。从所输入的若干字符串中，找出一个最大的串，并输出该串。要求串的输入以及最大串的查找通过调用编写的函数实现。-4, using the pointer method programming from keyboard input multiple strings (each string of no more than five characters and no spaces) with " *****"　as the input end of the mark. From the input string to identify one of the largest string, and outputs the string. Require string input as well as the largest string lookup by calling functions written.