Anyone familiar with the C language????

Question

hey guys
well ill give it a try. see if anyone here can help me. i need to input an integer and then convert it to a binary representation. size of the integer is 16 bits. can anyone help??? eg:
user input : 27
program output: 0000000000011011
would appreciate if anyone could help
cheers
milos

Answer 1

How about:
    public String getBits (int i) {
        String bits = "";
        for (int b = 0; b < 16; b ++, i >>= 1)
            bits = (((i & 1) == 1) ? '1' : '0') + bits;
        return bits;
    };You said you only need 16 bits, and that way should keep the bits in the right order, too (most significant on left).
In C/C++, a fast way to do that would be:
    char *getBits (unsigned int i, char *buf) {
        char *b = buf + 16;
        *b = 0;
        for (int j = 0; j < 16; j ++, i >>= 1)
            *(--b) = ((i & 1) + '0');
        return buf;
    };Doesn't matter if int is unsigned or not (except from the standpoint of you preventing the programmer from accidently passing a negative number), since your only getting the low 16 bits, and arithmetic right shifts won't affect this anyway. Didn't test that, hopefully it works. Yeah, sure its unsafe, but only if buf isn't at least 17 bytes.
Jason