void U305::operator()()
{
std::vector<size_t> answers;
answers.reserve(15);
answers.push_back(0);
std::generate_n(std::back_inserter(answers), 15, [&]() -> size_t {
size_t probe(1);
size_t k = answers.size();
for (; circle_count(k, ++probe) != k;);
return probe;
});
std::istream_iterator<size_t> iin(std::cin);
std::ostream_iterator<size_t> iout(std::cout, "\n");
std::transform(iin, std::istream_iterator<size_t>(), iout, [&](auto k) -> size_t {
return answers[k];
});
}
int main()
{
const char *cstr = "\nHello Github";
// Create iostream iterators
std::ostream_iterator<char> chout0(std::cout);
std::ostream_iterator<double> dout0(std::cout, cstr);
// Use istream iterator operations
std::cout << std::boolalpha;
std::istream_iterator<int> iin(std::cin);
std::cout << "++iin : " << *(++iin) << std::endl;
std::cout << "iin++ : " << *iin++ << std::endl;
std::istream_iterator<std::string> sin(std::cin);
std::cout << "*sin.size() : " << sin->size() << std::endl;
std::istream_iterator<char> chin0(std::cin), chin1(std::cin);
std::cout << "chin0 == chin1 : " << (chin0 == chin1) << std::endl;
std::cout << "chin0 != chin1 : " << (chin0 != chin1) << std::endl;
std::cout << "value in chin1 : " << *chin1 << std::endl;
// Use iostream iterator operations
char c_val('v');
std::cout << "c_val = ";
chout0 = c_val;
std::cout << std::endl;
double d_val(84.34);
std::cout << "d_val = ";
dout0 = d_val;
std::cout << std::endl;
// Read and write iostream iterators
std::ifstream ifs("topics.txt");
if(ifs.is_open()){
std::istream_iterator<std::string> str_it(ifs);
std::istream_iterator<std::string> str_end;
while(++str_it != str_end)
std::cout << *str_it << std::endl;
}
return 0;
}
