lang/hexfloat.cpp

The following code example is taken from the book
C++17 - The Complete Guide by Nicolai M. Josuttis, Leanpub, 2017
The code is licensed under a Creative Commons Attribution 4.0 International License.

---

// raw code

#include <iostream>
#include <iomanip>

int main()
{
  // init list of floating-point values:
  std::initializer_list<double> values {
                    0x1p4,        // 16
                    0xA,          // 10
                    0xAp2,        // 40
                    5e0,          // 5
                    0x1.4p+2,     // 5
                    1e5,          // 100000
                    0x1.86Ap+16,  // 100000
                    0xC.68p+2,    // 49.625
  };

  // print all values both as decimal and hexadecimal value:
  for (double d : values) {
    std::cout << "dec: " << std::setw(6) << std::defaultfloat << d
              << "  hex: " << std::hexfloat << d << '\n';
  }
}