Thread: No ios_base class in Dev-C++4?

Why does this come up with "ios_base undeclared" in Dev-C++4?

Code:

#include <iostream>

int main ()
{
	char c = 'ÿ';
	std::cout.flags(std::ios_base::hex | std::ios_base::showbase);
	std::cout << int(c);
	
	return 0;
}

It works fine in VC++... what's the deal?