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;
}