Cstring,char*,string conversion (Turn)

Source: Internet
Author: User
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 ""
2,C_STR (), returns an array of strings with "yes"
3,copy ()
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int turn CString:
Cstring.format ("%d", int);
...............................
String Turn CString
Cstring.format ("%s", String.c_str ());
Using C_str () is indeed better than data ().
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char* Turn CString
Cstring.format ("%s", char*); CString strtest;
char * CHARPOINT;
Charpoint= "Give string a value";
Strtest=charpoint; Direct Pay Value
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CString Turn int
CString ss= "1212.12";
int Temp=atoi (ss); Atoi _atoi64 or Atol

Converts a character to an integer, and you can use Atoi, _atoi64, or ATOL.
int int_chage = Atoi ((LPCSTR) SS);
Or:
CString str = "23";
UINT UINT;
SSCANF (str, "%d", uint);
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string int
..............................
char* Turn 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);
...................................................................
CString Turn string
String s (Cstring.getbuffer ());
GetBuffer () must be releasebuffer (), otherwise there is no space to free the buffer.
..........................................
int turn string
..........................................
char* Turn string
string S (char *);
Your can only initialize, in the place that does not initialize is best still use assign ().
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CString Turn char *
CString strtest= "WWWWTTTTTTT";
Charpoint=strtest. GetBuffer (strtest. GetLength ()); CString conversion char[100]
Char a[100];
CString Str ("aaaaaa");
strncpy (A, (LPCTSTR) str,sizeof (a)); CString str= "AAA";
char* ch;
Ch= (char*) (LPCTSTR) str;
..........................................
int to char * has a function in the Stdlib.h itoa ()
Usage of itoa:
Itoa (i,num,10);
I need to convert numbers into characters
A variable that saves characters after NUM conversion
10 The cardinality of the conversion number (in) 10 means to convert the number in 10. It can be 2,8,16, etc. you like the type of the system
Prototype: char *itoa (int value, char* string, int radix);
Instance:
#include "Stdlib.h"
#include "stdio.h"
Main ()
{
int i=1234;
Char s[5];
Itoa (i,s,10);
printf ("%s", s);
GetChar ();
}
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String char *
Char *p = STRING.C_STR ();

String AA ("AAA");
Char *c=aa.c_str (); String Mngname;
Char t[200];
memset (t,0,200);
strcpy (T,mngname.c_str ());
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There is no String,char *==char in standard C []==string can convert char * to CString using the Cstring.format ("%s", char *) method. To convert the CString to char *, use the operator (LPCSTR) to CString it. Cannot convert from ' const char * ' to ' char * '
const char *C=AA.C_STR ();
STRING.C_STR () can only be converted to const char *

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