std::hexfloat and std::defaultfloat not found

[ChajusSaib]

How come std::hexfloat and std::defaultfloat cannot be found. I get the error that no member can be found with both clang and g++. My g++ is on version 4.9.2 and clang is on 3.5.0. And I tried with both c++11 and c++1y.

#include <iostream>
#include <cmath>

int main()
{
	std::cout << "default format: " << 100 * std::sqrt(2.0) << '\n'
		<< "scientific " << std::scientific << 100 * std::sqrt(2.0) << '\n'
		<< "fixed_decimal " << std::fixed << 100 * std::sqrt(2.0) << '\n'
		<< "hexadecimal " << std::hexfloat << 100 * std::sqrt(2.0) << '\n'
		<< "use default: " << std::defaultfloat << 100 * std::sqrt(2.0) << std::endl;

	return 0;
}

Did the compilers drop support for these functions?

[MiiNiPaa]

#include <iomanip>
http://coliru.stacked-crooked.com/a/594b183de0a7e286

[ChajusSaib]

Well it seems like my version of the compiler doesn't support it. Will have to upgrade to 5.2.0

Coliru is using gcc version 5.2.0

[JLBorges]

> My g++ is on version 4.9.2 and clang is on 3.5.0

Update to g++ 5.1 or above, clang++ 3.6.0 or above.
http://coliru.stacked-crooked.com/a/4120c2a4fbd8f16c

std::hexfloat and std::defaultfloat are declared in header <ios>
Typically use: #include <iostream> The standard specifies that <iostream> must include <ios>

[ChajusSaib]

@JLBorges

Cheers for the reply buddy. I will update both clang and g++.