Conversion between CString, int, string, char* _string

1 conversion between the cstring,int,string,char*
String Turn CString
Cstring.format ("%s", String.c_str ());

Char Turn CString
Cstring.format ("%s", char*);

Char Turn string
string S (char *);

String char *
Char *p = STRING.C_STR ();

CString turn std::string
CString str = dlg. GetPathName ();
SetLocale (Lc_all, "CHS");
Char *p = new char[256];
Wcstombs (P, str, 256);
M_filename = p;

1,string-> CString
Cstring.format ("%s", String.c_str ());
Using C_str () is indeed better than data ().
2,char-> String
string S (char *);
Your can only initialize, in the place that does not initialize is best still use assign ().
3,cstring-> String
String s (Cstring.getbuffer ());
GetBuffer () must be releasebuffer (), otherwise there is no space to free the buffer.

In the C + + standard library of functions.
There are three functions that can convert the contents of a string into character arrays and c-string
1.data (), returns an array of strings without "/0"
2,C_STR (), returns an array of strings with "/0"
3,copy ()

CString Cross int

Converts a character to an integer, and you can use Atoi, _atoi64, or ATOL.
To convert a number to a CString variable, you can use the CString format function. Such as
CString s;
int i = 64;
S.format ("%d", i)
The Format function is very powerful and worth studying.

void Cstrdlg::onbutton1 ()
{
Todo:add your control notification handler code here
CString
Ss= "1212.12";
int Temp=atoi (ss);
CString AA;
Aa. Format ("%d", temp);
AfxMessageBox ("var is" + AA);
}

Sart. Format ("%s", buf);

CString Mutual Turn char*

char * to CString
CString strtest;
char * CHARPOINT;
Charpoint= "Give string a value";
Strtest=charpoint;

CString to char *
Charpoint=strtest. GetBuffer (strtest. GetLength ());

There is no String,char *==char in standard C []==string

You can use the Cstring.format ("%s", char *) method to turn char * to CString. To convert the CString to char *, use the operator (LPCSTR) to CString it.

CString conversion char[100]

Char a[100];
CString Str ("aaaaaa");
strncpy (A, (LPCTSTR) str,sizeof (a));
2 conversion of CString type to int
Convert CString type to int
Converts a character to an integer, and you can use Atoi, _atoi64, or ATOL.

CString AAA = "16";
int int_chage = Atoi ((LPCSTR) AAA);

To convert a number to a CString variable, you can use the CString format function. Such as
CString s;
int i = 64;
S.format ("%d", i)
The Format function is very powerful and worth studying.
If you are using a char array, you can also use the sprintf function.

CString ss= "1212.12";
int Temp=atoi (ss);
CString AA;
Aa. Format ("%d", temp);

Digital-> strings are Cstring::format, FORMATV, sprintf and AFX Itoa

3 char* in the loading int
#include <stdlib.h>

int atoi (const char *nptr);
Long Atol (const char *nptr);
Long Long Atoll (const char *nptr);
Long Long Atoq (const char *nptr);

4 Conversion between the cstring,int,string,char*
String AA ("AAA");
Char *c=aa.c_str ();

Cannot convert from ' const char * ' to ' char * '
const char *C=AA.C_STR ();

5 conversion between the cstring,int,string,char*
STRING.C_STR () can only be converted to const char *,
To convert to char * This writes:

String Mngname;
Char t[200]; memset (t,0,200); strcpy (T,mngname.c_str ());