14i.cpp

C/C++程序设计导论（第二版）》程序源文件

#include <iostream.h>
// colors()  Separate a 16-bit RGB pixel into individual colors
// IN: pixel is a 16-bit RGB value
// OUT: red, green, and blue are returned as individual color values
void colors (int pixel, int& red, int& green, int& blue)
{	const int FIVEBITS = 0x1F;					// lower 5 bits are 1's
	red = (pixel >> 10) & FIVEBITS;
	green = (pixel >> 5) & FIVEBITS;
	blue = pixel & FIVEBITS;
}

void main ()
 { int red, green, blue, pixel = 0x1234;
	colors (pixel, red, green, blue);
	cout << red << "," << green << "," << blue << endl;
 }