#include <stdint.h>

 #include <stdio.h>

 #include <ctype.h>

 #include <string.h>

 bool between(uint32_t start,uint32_t end,uint32_t aim);

 char get_first_letter(wchar_t wchar);

 void get_first_letters(const char *szChinese,char piyinBuf[],const uint32_t maxBufLen,uint32_t &piyinBufLen);

 int32_t main()

 {

     char buf[] = {};

     uint32_t len = ;

     const char *szChinese = "qaz123获取汉字拼音";

     get_first_letters(szChinese,buf,,len);

     printf("%s\n",buf);

     return ;

 }

 void get_first_letters(const char *szChinese,char piyinBuf[],const uint32_t maxBufLen,uint32_t &piyinBufLen)

 {

     uint8_t chr[];

     piyinBufLen = ;

     uint32_t chineseLen = strlen(szChinese);

     for (uint32_t i = ; i < chineseLen && piyinBufLen < maxBufLen; ++i)

     {

         uint8_t c = szChinese[i];

         // 排除askii 码

         if (isascii(c))

         {

             piyinBuf[piyinBufLen++] = c;

         }

         else

         {

             chr[] = szChinese[i];

             chr[] = szChinese[++i];

             chr[] = ;

             wchar_t wchr = ;

             wchr =  (chr[]  &  0xff)  <<  ;

             wchr |= (chr[]  &  0xff);

             piyinBuf[piyinBufLen++] = toupper(get_first_letter(wchr));

         }

     }

 }

 bool between(wchar_t start,wchar_t end,wchar_t aim)

 {

     if (start <= aim && aim <= end)

     {

         return true;

     }

     return false;

 }

 char get_first_letter(wchar_t wchar)

 {

     if  (between(0xB0A1,0xB0C4,wchar))  return  'a';

     if  (between(0XB0C5,0XB2C0,wchar))  return  'b';

     if  (between(0xB2C1,0xB4ED,wchar))  return  'c';

     if  (between(0xB4EE,0xB6E9,wchar))  return  'd';

     if  (between(0xB6EA,0xB7A1,wchar))  return  'e';

     if  (between(0xB7A2,0xB8c0,wchar))  return  'f';

     if  (between(0xB8C1,0xB9FD,wchar))  return  'g';

     if  (between(0xB9FE,0xBBF6,wchar))  return  'h';

     if  (between(0xBBF7,0xBFA5,wchar))  return  'j';

     if  (between(0xBFA6,0xC0AB,wchar))  return  'k';

     if  (between(0xC0AC,0xC2E7,wchar))  return  'l';

     if  (between(0xC2E8,0xC4C2,wchar))  return  'm';

     if  (between(0xC4C3,0xC5B5,wchar))  return  'n';

     if  (between(0xC5B6,0xC5BD,wchar))  return  'o';

     if  (between(0xC5BE,0xC6D9,wchar))  return  'p';

     if  (between(0xC6DA,0xC8BA,wchar))  return  'q';

     if  (between(0xC8BB,0xC8F5,wchar))  return  'r';

     if  (between(0xC8F6,0xCBF0,wchar))  return  's';

     if  (between(0xCBFA,0xCDD9,wchar))  return  't';

     if  (between(0xCDDA,0xCEF3,wchar))  return  'w';

     if  (between(0xCEF4,0xD188,wchar))  return  'x';

     if  (between(0xD1B9,0xD4D0,wchar))  return  'y';

     if  (between(0xD4D1,0xD7F9,wchar))  return  'z';

     return  '\0';

 }