转自cs_wu原文 C++ char*，const char*，string的相互转换
1. string转const char*
string s ="abc"; const char* c_s = s.c_str();
2. const char*转string
const char* c_s ="abc"; string s(c_s);
3. string转char*
string s ="abc"; char* c; const int len = s.length(); c =new char[len+1]; strcpy(c,s.c_str());
4. char*转string
char* c ="abc"; string s(c);
5. const char*转char*
const char* cpc ="abc"; char* pc =new char[100];//足够长 strcpy(pc,cpc);
原文：https://www.cnblogs.com/arxive/p/11715301.html