该程序功能是比较两个字符串的长度。解题过程是首先分别求得两个字符串的长度，然后对这两个值进行判断，实现两个字符串长度的比较。-　The length of the program function is to compare two strings.Problem solving process is first　uated two the length of the string, and then the two values to judge, compare two string length.