Using an enumeration type for colors. - C++ Data Type

C++ examples for Data Type:enum

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Description

Using an enumeration type for colors.

Demo Code

#include <iostream>
#include <iomanip>

int main()//from  w  w  w. ja  va  2 s. c o m
{
  const unsigned int R {0x00FF0000};
  const unsigned int G {0x0000FF00};
  const unsigned int B {0x000000FF};
  enum class Color :unsigned int{ Red = R, Green = G, Yellow = R | G, Purple = R | B, Blue = B, Black = 0, White = R | G | B };

  Color color1 {Color::Yellow};
  Color color2 {Color::Purple};
  Color color3 {Color::Green};

  unsigned int color {static_cast<unsigned int>(color1)};                                 // Get the enumerator value

  std::cout << std::setw(38) << "The components of color1 (yellow) are:"
    << "  Red:" << std::setw(3) << ((color & R) >> 16)
    << "  Green:" << std::setw(3) << ((color & G) >> 8)
    << "  Blue:" << std::setw(3) << (color & B) << std::endl;

  color = static_cast<unsigned int>(color2);

  std::cout << std::setw(38) << "The components of color2 (purple) are:"
    << "  Red:" << std::setw(3) << ((color & R) >> 16)
    << "  Green:" << std::setw(3) << ((color & G) >> 8)
    << "  Blue:" << std::setw(3) << (color & B) << std::endl;

  color = static_cast<unsigned int>(color3);

  std::cout << std::setw(38) << "The components of color3 (green) are:"
    << "  Red:" << std::setw(3) << ((color & R) >> 16)
    << "  Green:" << std::setw(3) << ((color & G) >> 8)
    << "  Blue:" << std::setw(3) << (color & B) << std::endl;
}

Result


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