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*

1 2	string s ="abc"; const char* c_s = s.c_str();

2. const char*转string

   直接赋值即可

1 2	const char* c_s ="abc"; string s(c_s);

 3. string转char*

1 2 3 4 5

string s ="abc"; char* c; const int len = s.length(); c =new char[len+1]; strcpy(c,s.c_str());

 4. char*转string

1 2	char* c ="abc"; string s(c);

 5. const char*转char*

1 2 3

const char* cpc ="abc"; char* pc =new char[100];//足够长 strcpy(pc,cpc);