Cstring, char *, String, _ bstr_t, ctime, datetime convert each other

#include <string>
     
#include <iostream> 

Using namespace STD;
Void main (void)
{
Cstring strcstring = "ABC ";
Char strchar [256], * pstr;

Pstr = (lpstr) (lpctstr) strcstring; // cstring ----> char *
Strcpy (strchar, (lpstr) (lpctstr) strcstring); // cstring ----> char []

_ Bstr_t strbstr = pstr; // char * ----> _ bstr_t
Wchar * strwchar = strbstr; // B _str_t ---> Unicode

Strbstr = strwchar;
Pstr = strbstr; // Unicode ----> char *

Strcstring = "10 ";
Int istr = atoi (lpstr) (lpctstr) strcstring); // cstring, char [], char * ------> int
Strcstring. Format ("% d", istr); // int -----> cstring
Sprintf (strchar, "% d", istr); // int -----> char []

Pstr = new char [256]; // string request Space
Strcpy (pstr, "ABC"); // string value assignment
Delete [] pstr; // string release

String strstring = "ABC ";
Pstr = (char *) strstring. c_str (); // string ----> char *

Strcstring = "6:24:37"; // cstring ---> coledatetime
Colevariant vtime (strcstring );
Vtime. changetype (vt_date );
Coledatetime time4 = vtime;



Coledatetime time1 (1977,4, 16,2,); // coledatatime ---> ctime
Systemtime receivime;
Varianttimetosystemtime (time1, & systime );
Ctime TM (systime );

Time_t time2 = TM. gettime (); // ctime ---> time_t
Coledatetime time3 (time2); // time_t ---> coledatetime

// Determine whether the string is of a certain type
Cstring svalue ("123.1 ");
Colevariant vvalue (svalue );

Bool bstrisfloat = (succeeded (variantchangetype (& vvalue, & vvalue, 0, vt_r8) & svalue. Find ('.')! =-1 );
If (bstrisfloat)
{
Afxmessagebox ("Floating Point ");
}
}