程序代码：

int main(int argc, char *argv[])
{
    char dec[]={'1','4','6','A','5','D','7','8','C','C','B','4','\0'};
    printf("原始串是:%s\n",dec);
    int len=sizeof(dec)/sizeof(char)-1;
    int i;
    char tmp;
    for(i=0;i<len/2;i++)
    {
        if(i%2==0)
        {
            tmp=dec[i];
            dec[i]=dec[len-2-i];
            dec[len-2-i]=dec[i];
            dec[len-2-i]=tmp;
        }
        else
        {
            tmp=dec[i];
            dec[i]=dec[len-i];
            dec[len-i]=dec[i];
            dec[len-i]=tmp;
        }


    }
    printf("转换后串是:%s\n",dec);
   
    return 0;
}