CString, int, string, char * Conversion

1 CString, int, string, char * Conversion

String to CString

CString. format ("% s", string. c_str ());

Convert char to CString

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

Char to string

String s (char *);

String to char *

Char * p = string. c_str ();

// Convert CString to 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. format ("% s", string. c_str (); c_str () is indeed better than data (). 2, char-> string

String s (char *);

You can only initialize it. It is best to use assign () unless it is initialized (). 3, CString-> string s (CString. getBuffer (); after GetBuffer (), it must be ReleaseBuffer (); otherwise, no space occupied by the buffer will be released.

As mentioned in C ++ standard function library

There are three functions that can convert the content of a string to a character array and a C-string

1. data (), returns a string array 2, c_str () without "", returns a string array 3 with "", copy ()

CString mutual int Conversion

Converts a character to an integer. You can use atoi, _ atoi64, or atol.

To convert a number to a CString variable, you can use the Format function of CString. For example

CString s;

Int I = 64;

The s. Format ("% d", I) Format function is very powerful and worth your research.

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 );

Convert CString to 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 in Standard C, char * = char [] = string

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

CString conversion char [100]

 

Char a [100];

CString str ("aaaaaa ");

Strncpy (a, (LPCTSTR) str, sizeof ());

2 CString type conversion to int

CString type conversion to int

Converts a character to an integer. 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 Format function of CString. For example

CString s;

Int I = 64;

The s. Format ("% d", I) Format function is very powerful and worth your research.

If the char array is used, you can also use the sprintf function.

/Cstring ss = "1212.12 ";

// Int temp = atoi (ss );

// CString aa;

// Aa. Format ("% d", temp );

Numbers-> strings include CString: Format, FormatV, sprintf, and itoa without Afx.

3 char * In int

# Include <stdlib. h>

Int atoi (const char * nptr );

Long atol (const char * nptr );

Long atoll (const char * nptr );

Long atoq (const char * nptr );

4 CString, int, string, char * Conversion

String aa ("aaa ");

Char * c = aa. c_str ();

Cannot convert from 'const char * 'to 'Char *'

Const char * c = aa. c_str ();

5 conversion between CString, int, string, char * string. c_str () can only be converted to const char *,

To convert it to char *, write as follows:

String mngName;

Char t [200]; memset (t, 0,200); strcpy (t, mngName. c_str ());