string、const char*、 char* 、char[]相互转换（全）
https://blog.csdn.net/rongrongyaofeiqi/article/details/52442169#commentBox
string、const char*、 char* 、char[]相互转换（待整理)
新战场:https://blog.csdn.net/Stephen___Qin
https://blog.csdn.net/rongrongyaofeiqi/article/details/52442169#commentBox