C++ char*，const char*，string的相互转换
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;
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;//足够长
strcpy(pc,cpc);
参考：
【1】https://www.cnblogs.com/wuyepeng/p/9729943.html
string path = path_buff;
path = path + "\\sky.jpg";
int charlength = strlen(path.c_str()) + 1;
char* strc = new char;
strcpy_s(strc, charlength, path.c_str());
return strc; string path = path_buff;
path = path + "\\sky.jpg";
int charlength = strlen(path.c_str()) + 1;
char* strc = new char;
strcpy(strc, path.c_str());
return strc;
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