wchar_t char string wstring 之间的转换

wchar_t char string wstring 之间的转换

 

转：http://blog.csdn.net/lbd2008/article/details/8333583

在处理中文时有时需要进行wchar_t，char，string，wstring之间的转换。

其中char和string之间、wchar_t和wstring之间的转换较为简单，代码在vs2010下测试通过。

 

#include <iostream>

#include <string>

#include <tchar.h>

#include <Windows.h>



using namespace std;



//Converting&nbsp;a&nbsp;WChar&nbsp;string&nbsp;to&nbsp;a&nbsp;Ansi&nbsp;string

char *w2c(char *pcstr,const wchar_t *pwstr, size_t len)

{

    int nlength=wcslen(pwstr);

    //获取转换后的长度

    int nbytes = WideCharToMultiByte( 0, 0, pwstr, nlength, NULL,0,NULL, NULL ); 

    if(nbytes>len)   nbytes=len;

    // 通过以上得到的结果，转换unicode 字符为ascii 字符

    WideCharToMultiByte( 0,0, pwstr, nlength,   pcstr, nbytes, NULL,   NULL );

    return pcstr ;

}



int main(){



    setlocale(LC_ALL,"chs");

    char* cc = "this is a char 测试";

    wchar_t* wcc = L"this is a wchar 测试";

    string str("this is a string 测试 ");

    wstring wstr = L"this is a wstring 测试";





    //string to char

    const char* char_test = str.c_str(); 

    //cout<<"char_test:"<<char_test<<endl;



    //char to string

    string ss = cc;

    //cout<<"ss is :"<<ss<<endl;



    //wstring to wchar

    const wchar_t* wchar_test = wstr.c_str(); 

    //wcout<<wchar_test<<endl;



    //wchar to wstring

    wstring wss = wcc;

    wcout<<wcc<<endl;



    //char to wchar_t

    wchar_t *wc = new wchar_t[str.size()+1];

    //swprintf(wc,L"%S",cc); 

    //wcout<<cc<<endl;

    delete []wc;

    

    // wchar_t to char

    char *pcstr = (char *)malloc(sizeof(char)*(2 * wcslen(wcc)+1));

    memset(pcstr , 0 , 2 * wcslen(wcc)+1 );

    w2c(pcstr,wcc,2 * wcslen(wcc)+1) ;

    free(pcstr);

    

    system("pause");

    return 1;

}