说明：  本文关键词： c++ 字符串 函数 char *strcpy(char *s1, const char *s2) 将字符串s2复制到字符串数组s1中，返回s1的值 char *strncpy(char *s1, const char *s2, size_t n) 将字符串s2中最多n个字符复制到字符串数组s1中，返回s1的值
(This article Keywords: c++ String function char* strcpy (char* s1, const char* s2) will copy the string s2 to string s1 in the array, the value of s1 return char* strncpy (char* s1, const char* s2, size_t n) string s2 to be the most n characters are copied to the array string s1, the return value of s1)