1. string 转 const char*
string s ="abc";
const char* c_s = s.c_str();
2. const char* 转 string
constchar* 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*
constchar* cpc ="abc";
char* pc =newchar[100];//足够长
strcpy(pc,cpc);
转自laiyangpair