Conversion of C + + Char*,const Char*,string,int to each other

Conversion of C + + Char*,const Char*,string,int to each other

1. String to const char*

String s ="abc";
Const Char* c_s = s. C_str();

2. Const char* to a string directly assigns the value can

Const Char* c_s ="abc";
String s(c_s);

3. String Transfer char*

string s = "ABC" char* c constint len =  s. ();
c =new char [len+1];
strcpy (c,s c_str ())

4. char* Turn string

Char* c ="abc";
String s(c);

5. Const char* Turn char*

Const Char* CPC ="abc";
Char* pc =new char[+]; Long enough
strcpy(pc,CPC)

< Span class= "pun" >< Span class= "KWD" >< Span class= "pun" >6.string with int

< Span class= "pun" >< Span class= "KWD" >< Span class= "pun" >string kind_str = "123";

int kind = atoi (Kind_str.c_str ());

Conversion of C + + Char*,const Char*,string,int to each other