Converting integer to a bit representation

Question

How can I convert a integer to its bit representation. I want to take an integer and return a vector that has contains 1\'s and 0\'s of the integer\'s bit representation.

Answer 1

Returns a string instead of a vector, but can be easily changed.

template
std::string get_bits(T value) {
    int size = sizeof(value) * CHAR_BIT;
    std::string ret;
    ret.reserve(size);
    for (int i = size-1; i >= 0; --i)
        ret += (value & (1 << i)) == 0 ? '0' : '1';
    return ret;
}