wchar 与 char 的互换
#include <iostream> #include <stdio.h>#include <windows.h> using namespace std;//#include <tchar.h>char *w2c(char *pcstr,const wchar_t *pwstr, size_t len);void c2w(wchar_t *pwstr,size_t len,const char *str);int main(int argc, char* argv[]){wchar_t pwstr[] =L"我是中国人";printf("===============");wprintf(L"原始数据 pwstr:%s",pwstr);wchar_t pwstr2[20]; char *pcstr = (char *)malloc(sizeof(char)*(2 * wcslen(pwstr)+1)); memset(pcstr , 0 , 2 * wcslen(pwstr)+1 ); w2c(pcstr,pwstr,2 * wcslen(pwstr)+1) ;printf("wchar=>char result:%s\n",pcstr); c2w(pwstr2,20,pcstr); wprintf(L"%s",pwstr2); free(pcstr) ; return 0;}//将wchar_t* 转成char*的实现函数如下：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, // specify the code page used to perform the conversion0, // no special flags to handle unmapped characterspwstr, // wide character string to convertnlength, // the number of wide characters in that stringNULL, // no output buffer given, we just want to know how long it needs to be0,NULL, // no replacement character givenNULL ); // we don't want to know if a character didn't make it through the translation// make sure the buffer is big enough for this, making it larger if necessaryif(nbytes>len) nbytes=len;// 通过以上得到的结果，转换unicode 字符为ascii 字符WideCharToMultiByte( 0, // specify the code page used to perform the conversion0, // no special flags to handle unmapped characterspwstr, // wide character string to convertnlength, // the number of wide characters in that stringpcstr, // put the output ascii characters at the end of the buffernbytes, // there is at least this much space thereNULL, // no replacement character givenNULL );return pcstr ;}//将char* 转成wchar_t*的实现函数如下：//这是把asii字符转换为unicode字符，和上面相同的原理void c2w(wchar_t *pwstr,size_t len,const char *str){if(str) { size_t nu = strlen(str); size_t n =(size_t)MultiByteToWideChar(CP_ACP,0,(const char *)str,(int)nu,NULL,0); if(n>=len)n=len-1; MultiByteToWideChar(CP_ACP,0,(const char *)str,(int)nu,pwstr,(int)n); pwstr[n]=0; }}//或者用此种方法更好一些：============我自已做的//把ascii 字符转换为unicode字符//wchar_t* Cphone_hq::ctow(wchar_t *pwstr, const char *str)//{//wchar_t* buffer;//if(str)// {// size_t nu = strlen(str);// size_t n =(size_t)MultiByteToWideChar(CP_ACP,0,(const char *)str,int(nu),NULL,0);// buffer=0;// buffer = new wchar_t[n+1];// //if(n>=len) n=len-1;// ::MultiByteToWideChar(CP_ACP,0,(const char *)str,int(nu),buffer,int(n)); //// }//return buffer;//delete buffer;//}