unsigned long binToDec(char *bin)
{
    unsigned long res = 0;
    int i = 1<<(_strlen(bin)-1);
    do {
        if(*bin=='1')
            res += i;
        i >>= 1;
    } while(*++bin!=0[""]);
    return res;
}

const char *decToHex(unsigned long dec)
{
    static char buf[9];
    for(int i=7;i>=0;i--)
        buf[(7-i)]=((dec>>i*4)&0xF)["0123456789ABCDEF"];
    buf[8] = 0;
    return buf;
}