std::ios_base::fmtflags

typedef /*implementation defined*/ fmtflags;

static constexpr fmtflags dec = /*implementation defined*/
static constexpr fmtflags oct = /*implementation defined*/
static constexpr fmtflags hex = /*implementation defined*/
static constexpr fmtflags basefield = dec | oct | hex;

static constexpr fmtflags left = /*implementation defined*/
static constexpr fmtflags right = /*implementation defined*/
static constexpr fmtflags internal = /*implementation defined*/
static constexpr fmtflags adjustfield = left | right | internal;

static constexpr fmtflags scientific = /*implementation defined*/
static constexpr fmtflags fixed = /*implementation defined*/
static constexpr fmtflags floatfield = scientific | fixed;

static constexpr fmtflags boolalpha = /*implementation defined*/
static constexpr fmtflags showbase = /*implementation defined*/
static constexpr fmtflags showpoint = /*implementation defined*/
static constexpr fmtflags showpos = /*implementation defined*/
static constexpr fmtflags skipws = /*implementation defined*/
static constexpr fmtflags unitbuf = /*implementation defined*/
static constexpr fmtflags uppercase = /*implementation defined*/

#include <iostream>
 
int main()
{
    const int num = 150;
 
    // using fmtflags as class member constants:
    std::cout.setf(std::ios_base::hex, std::ios_base::basefield);
    std::cout.setf(std::ios_base::showbase);
    std::cout << num << '\n';
 
    // using fmtflags as inherited class member constants:
    std::cout.setf (std::ios::hex, std::ios::basefield);
    std::cout.setf (std::ios::showbase);
    std::cout << num << '\n';
 
    // using fmtflags as object member constants:
    std::cout.setf(std::cout.hex, std::cout.basefield);
    std::cout.setf(std::cout.showbase);
    std::cout << num << '\n';
 
    // using fmtflags as a type:
    std::ios_base::fmtflags ff;
    ff = std::cout.flags();
    ff &= ~std::cout.basefield;   // unset basefield bits
    ff |= std::cout.hex;          // set hex
    ff |= std::cout.showbase;     // set showbase
    std::cout.flags(ff);
    std::cout << num << '\n';
 
    // not using fmtflags, but using manipulators:
    std::cout << std::hex << std::showbase << num << '\n';
}