#include "stdio.h"
#include<string.h>
#include <stdlib.H>
unsigned int wchar1[30];
////////////////////////////////
int gsmString2Bytes( unsigned char* pSrc, unsigned int* pDst, int nSrcLength)   
{   
    int i=0;   
    for(i=0;i<nSrcLength;i+=4);
    { if(*pSrc >='0' && *pSrc<='9')   
        {   
            *pDst = (*pSrc - '0') << 12;   
        }   
        else   
        {   
            *pDst = (*pSrc - 'A' + 10) << 12;   
        }   
      
        pSrc++;   
      
        if(*pSrc>='0' && *pSrc<='9')   
        {   
             *pDst |=(unsigned int)(( *pSrc - '0')<<8);   
        }   
        else   
        {   
            *pDst |=(unsigned int) ((*pSrc - 'A' + 10)<<8);   
        }  
         pSrc++;
         
       if (*pSrc >='0' && *pSrc<='9')   
        {   
            *pDst |= (unsigned int)((*pSrc - '0') << 4); //|在等号左边时后面不能是空格否则编译错误
        }   
        else   
        {   
            *pDst |= (unsigned int)((*pSrc - 'A' + 10) << 4);   
        }   
      
        pSrc++;   
      
        if(*pSrc>='0' && *pSrc<='9')   
        {   
            *pDst |= *pSrc - '0';   
        }   
        else   
        {   
            *pDst |= *pSrc - 'A' + 10;   
        }
        pSrc++;   
        pDst++;
         
    }   
   
    return nSrcLength / 4;   
}  

//////////////////////////////////
int main(void)
{
   int tt,kk;
    int bb;
    char *str="A85B9E2CAB35D56C031B";
    kk=strlen(str);   
    bb= gsmString2Bytes(str,wchar1,kk);  
    for(tt=0;tt<bb;tt++)
   {printf("integer = %x\n",wchar1[tt]);}
   return 0;   
}
结果输出：
integer =a5b8
integer =0
integer =0
integer =0
integer =0
希望的结果是：
integer =a5b8
integer =9e2c
integer =ab35
integer =d56c
integer =031b

#include <stdlib.H>

哦。。。第一个for那行后面多了个分号。。。

去掉后重编译运行，还是一样的，请再看一下