1 #include <string> 2 // 使用CString必须使用MFC,并且不可包含<windows.h> 3 #define _AFXDLL 4 #include <afx.h> 5 using namespace std; 6 //———————————————————————————- 7 //将 单字节char* 转换为 宽字节 wchar* 8 inline wchar_t* AnsiToUnicode( const char* szStr ) 9 { 10 int nLen = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, NULL, 0 ); 11 if (nLen == 0) 12 { 13 return NULL; 14 } 15 wchar_t* pResult = new wchar_t[nLen]; 16 MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, pResult, nLen ); 17 return pResult; 18 } 19 //———————————————————————————- 20 // 将 宽字节wchar_t* 转换 单字节char* 21 inline char* UnicodeToAnsi( const wchar_t* szStr ) 22 { 23 int nLen = WideCharToMultiByte( CP_ACP, 0, szStr, -1, NULL, 0, NULL, NULL ); 24 if (nLen == 0) 25 { 26 return NULL; 27 } 28 char* pResult = new char[nLen]; 29 WideCharToMultiByte( CP_ACP, 0, szStr, -1, pResult, nLen, NULL, NULL ); 30 return pResult; 31 } 32 //———————————————————————————- 33 // 将单字符 string 转换为宽字符 wstring 34 inline void Ascii2WideString( const std::string& szStr, std::wstring& wszStr ) 35 { 36 int nLength = MultiByteToWideChar( CP_ACP, 0, szStr.c_str(), -1, NULL, NULL ); 37 wszStr.resize(nLength); 38 LPWSTR lpwszStr = new wchar_t[nLength]; 39 MultiByteToWideChar( CP_ACP, 0, szStr.c_str(), -1, lpwszStr, nLength ); 40 wszStr = lpwszStr; 41 delete [] lpwszStr; 42 } 43 //———————————————————————————- 44 int _tmain(int argc, _TCHAR* argv[]) 45 { 46 char* pChar = “我喜欢char”; 47 wchar_t* pWideChar = L”我讨厌wchar_t”; 48 wchar_t tagWideCharList[100] ; 49 char ch = ‘A’; 50 char tagChar[100] = {NULL}; 51 CString cStr; 52 std::string str; 53 54 // 注:设置语言环境以便输出WideChar 55 setlocale(LC_ALL,”chs”); 56 57 // 注: char* 转换 wchar_t* 58 // 注: wchar_t 未重载 << ,所以不可使用 cout << 输出 59 pWideChar = AnsiToUnicode( pChar ); 60 // 注:printf(”%ls”) 和 wprintf(L”%s”) 一致 61 printf( “%ls\n”, pWideChar ); 62 63 // 注:wchar_t* 转换 wchar_t[] 64 wcscpy ( tagWideCharList, pWideChar ); 65 wprintf( L”%s\n”, tagWideCharList ); 66 67 // 注:wchar_t[] 转换 wchar_t* 68 pWideChar = tagWideCharList; 69 wprintf( L”%s\n”, pWideChar ); 70 71 // 注:char 转换 string 72 str.insert( str.begin(), ch ); 73 cout << str << endl; 74 75 // 注:wchar_t* 转换 string 76 pWideChar = new wchar_t[str.length()]; 77 swprintf( pWideChar, L”%s”, str.c_str()); 78 wprintf( L”%s\n”, pWideChar ); 79 80 // 注:string 转换 char* 81 pChar = const_cast<char*>(str.c_str()); 82 cout << pChar << endl; 83 84 // 注:char* 转换 string 85 str = std::string(pChar); 86 // 注: cout 的 << 重载了string, 若printf 的话必须 printf(”%s”, str.c_str()); 87 // 而不可 print( “%s”, str ); 因为 str 是个 string 类 88 cout << str << endl; 89 90 // 注:string 转换 char[] 91 str = “无聊啊无聊”; 92 strcpy( tagChar, str.c_str() ); 93 printf( “%s\n”, tagChar ); 94 95 // 注:string 转换 CString; 96 cStr = str.c_str(); 97 98 // 注:CString 转换 string 99 str = string(cStr.GetBuffer(cStr.GetLength())); 100 101 // 注:char* 转换 CString 102 cStr = pChar; 103 104 // 注:CString 转换 char* 105 pChar = cStr.GetBuffer( cStr.GetLength() ); 106 107 // 注:CString 转换 char[] 108 strncpy( tagChar, (LPCTSTR)CString, sizeof(tagChar)); 109 110 // 注:CString 转换 wchar_t* 111 pWideChar = cStr.AllocSysString(); 112 printf( “%ls\n”, pWideChar ); 113 }
1》string转wstring
wstring s2ws(const string& s)
{
_bstr_t t = s.c_str();
wchar_t* pwchar = (wchar_t*)t;
wstring result = pwchar;
return result;
}
2》wstring转string
string ws2s(const wstring& ws)
{
_bstr_t t = ws.c_str();
char* pchar = (char*)t;
string result = pchar;
return result;
}
3》string转cstring
a)CString.format("%s", string.c_str());
b)CString StringToCString(string str)
{
CString result;
for (int i=0;i<(int)str.length();i++)
{
result+=str[i];
}
return result;
}
4》cstring转string
a)void ConvertCString2string(CString& strSrc,std::string& strDes)
{
#ifndef UNICODE
strDes = strSrc;
#else USES_CONVERSION;
strDes = W2A(strSrc.LockBuffer());
strSrc.UnlockBuffer();
#endif
}
b)
string s(CString.GetBuffer());
ReleaseBuffer();
GetBuffer()后一定要ReleaseBuffer(),否则就没有释放缓冲区所占的空间.
c)
string CStringToString(CString cstr)
{
string result(cstr.GetLength(),'e');
for (int i=0;i<cstr.GetLength();i++)
{
result[i]=(char)cstr[i];
}
return result;
}
5》string转char *
a)char *p = string.c_str();
举例: string aa("aaa"); char *c=aa.c_str(); string mngName; char t[200]; memset(t,0,200); strcpy(t,mngName.c_str());
b)一个一个字符的赋值
char *p = new char[sring的长度+1];
p[string的长度]='/0';
但是要注意最后赋值'/0'!!!
char * StringToChar(string &str)
{
int len=str.length();
char * p= new char[len+1];
for (int i=0;i<len;i++)
{
p[i]=str[i];
}
p[len]='/0';
}
6》char* 转string
string s(char *); 你的只能初始化,在不是初始化的地方最好还是用assign();
string CharToString(char*arr,int count)
{
string result(arr,4);
return result;
}
string是ansi编码字符char
TCHAR是unicode编码字符wchar_t
7》string转TCHAR *
/*
wBuf 申明为指针即可。
*/
wchar_t *chr2wch(const char *buffer)
{
size_t len = strlen(buffer);
size_t wlen = MultiByteToWideChar(CP_ACP, 0, (const char*)buffer, int(len), NULL, 0);
wchar_t *wBuf = new wchar_t[wlen + 1];
MultiByteToWideChar(CP_ACP, 0, (const char*)buffer, int(len), wBuf, int(wlen));
return wBuf;
}
8》TCHAR *转string
char * wch2chr(LPCTSTR lpString)
{
// Calculate unicode string length.
UINT len = wcslen(lpString)*2;
char *buf = (char *)malloc(len);
UINT i = wcstombs(buf,lpString,len);
return buf;
}
9》string 和char*转int
string 转 int
..............................
char* 转 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);
10》int转char*和string
在stdlib.h中有个函数itoa()
itoa的用法:
itoa(i,num,10);
i 需要转换成字符的数字
num 转换后保存字符的变量
11》wstring转Csting
std::wstring转CString
CString str( filename.c_str() );
12》Cstring转wstring
CString转std::wstring
std::wstring str = filename.GetString();
13》Cstring转char *
CString cstr(asdd);
const char* ch = (LPCTSTR)cstr;
举例:
CString str= "i am good ";
char* lp=str.GetBuffer(str.GetLength());
str.ReleaseBuffer();
14》char *转Cstring
举例:
CString str;
char pStr[100];
str.Format( "%s ",pStr);
15》TCHar转char
***********************************************************************
* 函数: THCAR2Char
* 描述:将TCHAR* 转换为 char*
***********************************************************************
char* CPublic::THCAR2char(TCHAR* tchStr)
{
int iLen = 2*wcslen(tchStr);//CString,TCHAR汉字算一个字符,因此不用普通计算长度
char* chRtn = new char[iLen+1]
wcstombs(chRtn,tchStr,iLen+1);//转换成功返回为非负值
return chRtn;
}
16》char转tchar
定义了UNICODE宏之后,TCHAR就是宽字符wchar_t,否则TCHAR跟char是一样的^_
具体问题具体分析,浮云啊,一切皆是浮云.....
以下摘录自网络:
..............................................................
《C++标准函数库》中说的
有三个函数可以将字符串的内容转换为字符数组和C—string
1.data(),返回没有”/0“的字符串数组
2,c_str(),返回有”/0“的字符串数组
3,copy()
.................................................................
int 转 CString:
CString.Format("%d",int);
...............................
string 转 CString
CString.format("%s", string.c_str());
用c_str()确实比data()要好.
.......................................
char* 转 CString
CString.format("%s", char*);
CString strtest;
char * charpoint;
charpoint="give string a value";
strtest=charpoint; //直接付值
...................................................................
CString 转 int
CString ss="1212.12";
int temp=atoi(ss); //atoi _atoi64或atol
将字符转换为整数,可以使用atoi、_atoi64或atol。
int int_chage = atoi((lpcstr)ss) ;
或:
CString str = "23";
UINT uint;
sscanf(str, "%d", uint);
..............................
string 转 int
..............................
char* 转 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 转 string
string s(CString.GetBuffer());
GetBuffer()后一定要ReleaseBuffer(),否则就没有释放缓冲区所占的空间.
..........................................
int 转 string
..........................................
char* 转 string
string s(char *);
你的只能初始化,在不是初始化的地方最好还是用assign().
...................................................................
CString 转 char *
CString strtest="wwwwttttttt";
charpoint=strtest.GetBuffer(strtest.GetLength());
CString转换 char[100]
char a[100];
CString str("aaaaaa");
strncpy(a,(LPCTSTR)str,sizeof(a));
CString str="aaa";
char* ch;
ch=(char*)(LPCTSTR)str;
..........................................
int 转 char *
在stdlib.h中有个函数itoa()
itoa的用法:
itoa(i,num,10);
i 需要转换成字符的数字
num 转换后保存字符的变量
10 转换数字的基数(进制)10就是说按照10进制转换数字。还可以是2,8,16等等你喜欢的进制类型
原形:char *itoa(int value, char* string, int radix);
实例:
#include "stdlib.h"
#include "stdio.h"
main()
{
int i=1234;
char s[5];
itoa(i,s,10);
printf("%s",s);
getchar();
}
..........................................
string 转 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());
...................................................................
标准C里没有string,char *==char []==string
可以用CString.Format("%s",char *)这个方法来将char *转成CString。要把CString转成char *,用操
作符(LPCSTR)CString就可以了。
cannot convert from 'const char *' to 'char *'
const char *c=aa.c_str();
string.c_str()只能转换成const char *
#include <string>
// 使用CString必须使用MFC,并且不可包含<windows.h>
#define _AFXDLL
#include <afx.h>
using namespace std;
//———————————————————————————-
//将 单字节char* 转换为 宽字节 wchar*
inline wchar_t* AnsiToUnicode( const char* szStr )
{
int nLen = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, NULL, 0 );
if (nLen == 0)
{
return NULL;
}
wchar_t* pResult = new wchar_t[nLen];
MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, pResult, nLen );
return pResult;
}
//———————————————————————————-
// 将 宽字节wchar_t* 转换 单字节char*
inline char* UnicodeToAnsi( const wchar_t* szStr )
{
int nLen = WideCharToMultiByte( CP_ACP, 0, szStr, -1, NULL, 0, NULL, NULL );
if (nLen == 0)
{
return NULL;
}
char* pResult = new char[nLen];
WideCharToMultiByte( CP_ACP, 0, szStr, -1, pResult, nLen, NULL, NULL );
return pResult;
}
//———————————————————————————-
// 将单字符 string 转换为宽字符 wstring
inline void Ascii2WideString( const std::string& szStr, std::wstring& wszStr )
{
int nLength = MultiByteToWideChar( CP_ACP, 0, szStr.c_str(), -1, NULL, NULL );
wszStr.resize(nLength);
LPWSTR lpwszStr = new wchar_t[nLength];
MultiByteToWideChar( CP_ACP, 0, szStr.c_str(), -1, lpwszStr, nLength );
wszStr = lpwszStr;
delete [] lpwszStr;
}
//———————————————————————————-
int _tmain(int argc, _TCHAR* argv[])
{
char* pChar = “我喜欢char”;
wchar_t* pWideChar = L”我讨厌wchar_t”;
wchar_t tagWideCharList[100] ;
char ch = ‘A’;
char tagChar[100] = {NULL};
CString cStr;
std::string str;
// 注:设置语言环境以便输出WideChar
setlocale(LC_ALL,”chs”);
// 注: char* 转换 wchar_t*
// 注: wchar_t 未重载 << ,所以不可使用 cout << 输出
pWideChar = AnsiToUnicode( pChar );
// 注:printf(”%ls”) 和 wprintf(L”%s”) 一致
printf( “%ls/n”, pWideChar );
// 注:wchar_t* 转换 wchar_t[]
wcscpy ( tagWideCharList, pWideChar );
wprintf( L”%s/n”, tagWideCharList );
// 注:wchar_t[] 转换 wchar_t*
pWideChar = tagWideCharList;
wprintf( L”%s/n”, pWideChar );
// 注:char 转换 string
str.insert( str.begin(), ch );
cout << str << endl;
// 注:wchar_t* 转换 string
pWideChar = new wchar_t[str.length()];
swprintf( pWideChar, L”%s”, str.c_str());
wprintf( L”%s/n”, pWideChar );
// 注:string 转换 char*
pChar = const_cast<char*>(str.c_str());
cout << pChar << endl;
// 注:char* 转换 string
str = std::string(pChar);
// 注: cout 的 << 重载了string, 若printf 的话必须 printf(”%s”, str.c_str());
// 而不可 print( “%s”, str ); 因为 str 是个 string 类
cout << str << endl;
// 注:string 转换 char[]
str = “无聊啊无聊”;
strcpy( tagChar, str.c_str() );
printf( “%s/n”, tagChar );
// 注:string 转换 CString;
cStr = str.c_str();
// 注:CString 转换 string
str = string(cStr.GetBuffer(cStr.GetLength()));
// 注:char* 转换 CString
cStr = pChar;
// 注:CString 转换 char*
pChar = cStr.GetBuffer( cStr.GetLength() );
// 注:CString 转换 char[]
strncpy( tagChar, (LPCTSTR)CString, sizeof(tagChar));
// 注:CString 转换 wchar_t*
pWideChar = cStr.AllocSysString();
printf( “%ls/n”, pWideChar );
}
注:转自于:
http://punch.blog.163.com/blog/static/2285731201132833915754/
http://blog.csdn.net/bingxuebage/article/details/5930260