#include?“Dependencies\glew\glew.h“
#include?“Dependencies\freeglut\freeglut.h“
#include?

GLint?array[1000][2];?//保存要顯示的坐標點
int?length=0;
class?screenPt?{
private:
	GLint?x?y;
public:
	/*??Default?Constructor:initializes?coordinate?position?to?（00）.??*/
	screenPt（）?{
		x?=?y?=?0;
	}
	void?setCoords（GLint?xCoordValue?GLint?yCoordValue）?{
		x?=?xCoordValue;
		y?=?yCoordValue;
	}

	GLint?getx（）?const?{
		return?x;
	}

	GLint?gety（）?const?{
		return?y;
	}
	void?incrementx（）?{
		x++;
	}
	void?decrementy（）?{
		y--;
	}

};

void?init（void）?{
	glClearColor（1.0?1.0?1.0?0.0）;//窗口顏色（紅:[0.0~1.0]R?綠:[0.0~1.0]G，藍:[0.0~1.0]B?透明度:[0.0~1.0]A）

									?/*使用正投影將世界坐標系二位矩形區域的內容映射到屏幕上，區域的x坐標值從0.0到200.0，y坐標值從0.0到150.0*/
	glMatrixMode（GL_PROGRAM）;
	gluOrtho2D（0.0?200.0?0.0?150.0）;
}

void?setPixel（void）
{
	glClear（GL_COLOR_BUFFER_BIT）;//GL_COLOR_BUFFER_BIT是一個OpenGL符號常量，用來指定它的顏色緩存（刷新緩存）中的位值，該緩存將使用glClearColor函數中指定的值來設定。
	glColor3f（1.0f?0.0f?0.0f）;//設置線段顏色為紅色

	glPointSize（5.f）;?//設置點的大小

	glBegin（GL_POINTS）;
	
	for?（size_t?i?=?0;?i?<=length;?i++）
	{
		glVertex2i（array[i][1]?array[i][2]）;
	}
	
	glEnd（）;

	glFlush（）;//執行所有的OpenGL程序
}

void?circlePlotPoints（GLint?xc?GLint?yc?screenPt?circPt）
{
	//setPixel（xc?+?circPt.getx（）?yc?+?circPt.gety（））;
	//setPixel（xc?-?circPt.getx（）?yc?+?circPt.gety（））;
	//setPixel（xc?+?circPt.getx（）?yc?-?circPt.gety（））;
	//setPixel（xc?-?circPt.getx（）?yc?-?circPt.gety（））;
	//setPixel（xc?+?circPt.gety（）?yc?+?circPt.getx（））;
	//setPixel（xc?-?circPt.gety（）?yc?+?circPt.getx（））;
	//setPixel（xc?+?circPt.gety（）?yc?-?circPt.getx（））;
	//setPixel（xc?-?circPt.gety（）?yc?-?circPt.getx（））;
	printf（“（%d%d）\n“?xc?+?circPt.getx（）?yc?+?circPt.gety（））;
	//要顯示的坐標點保存至array[1000][2]
	array[length][1]?=?xc?+?circPt.getx（）?array[length][2]?=?yc?+?circPt.gety（）;
	
}

void?circleMidpoint（void）
{
	screenPt?circPt;
	GLint?xc?=?0;
	GLint?yc?=?0;
	GLint?radius?=?50;
	GLint?p?=?1?-?radius;???????????//?Initial?value?for?midpiont?parameter.
	
	circPt.setCoords（0?radius）;//?Set?coords?for?top?point?of?circle.
	
	void?circlePlotPoints（GLint?GLint?screenPt）;
	/*??Plot?the?initial?point?in?each?circle?quadrant.?*/
	circlePlotPoints（xc?yc?circPt）;
	/*??Calculate?next?point?and?plot?in?each?octant.??*/
	while?（circPt.getx（）		length++;
		circPt.incrementx（）;
		if?（p<0）
			p?+=?2?*?circPt.getx（）?+?1;
		else?{
			circPt.decrementy（）;
			p?+=?2?*?（circPt.getx（）?-?circPt.gety（））?+?1;
		}
		circlePlotPoints（xc?yc?circPt）;
	}
	
}


int?main（int?argc?char?*argv[]）
{
	glutInit（&argc?argv）;//初始化GULT
	glutInitDisplayMode（GLUT_RGB?|?GLUT_SINGLE）;//設置顯示模式
	glutInitWindowPosition（300500）;//設置左上角窗口顯示位置
	glutInitWindowSize（400?300）;//設置窗口顯示的寬與高
	glutCreateWindow（“中點畫圓算法“）;//創建一個窗口
	init（）;//執行初始化程序
	circleMidpoint（）;
	glutDisplayFunc（setPixel）;//把圖形顯示在窗口
	glutMainLoop（）;//顯示所有并進入等待狀態
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

????..A..H.?????32256??2017-09-21?13:48??circle\.vs\circle\v15\.suo

?????文件???32075776??2017-09-21?13:48??circle\.vs\circle\v15\Browse.VC.db

?????文件???33947648??2017-09-21?13:46??circle\.vs\circle\v15\ipch\AutoPCH\20e3d3569fc1d5c8\SOURCECPP.ipch

?????文件???????6497??2017-09-20?19:20??circle\circle\circle.vcxproj

?????文件????????950??2017-09-20?19:19??circle\circle\circle.vcxproj.filters

?????文件????????703??2015-03-14?15:34??circle\circle\Dependencies\freeglut\freeglut.h

?????文件??????36518??2015-03-14?15:24??circle\circle\Dependencies\freeglut\freeglut.lib

?????文件??????10682??2015-03-14?15:34??circle\circle\Dependencies\freeglut\freeglut_ext.h

?????文件??????27470??2015-07-22?08:45??circle\circle\Dependencies\freeglut\freeglut_std.h

?????文件????????660??2015-03-14?15:34??circle\circle\Dependencies\freeglut\glut.h

?????文件????1038562??2015-08-10?21:54??circle\circle\Dependencies\glew\glew.h

?????文件?????609776??2015-08-10?21:53??circle\circle\Dependencies\glew\glew32.lib

?????文件??????74912??2015-08-10?21:54??circle\circle\Dependencies\glew\glxew.h

?????文件??????64836??2015-08-10?21:54??circle\circle\Dependencies\glew\wglew.h

?????文件?????235008??2015-03-14?16:02??circle\circle\freeglut.dll

?????文件???????3182??2017-09-21?13:47??circle\circle\sourcecpp.cpp

?????文件????????858??2017-09-20?20:16??circle\circle\x64\Debug\circle.Build.CppClean.log

?????文件????????188??2017-09-21?13:47??circle\circle\x64\Debug\circle.log

?????文件????????208??2017-09-21?13:47??circle\circle\x64\Debug\circle.tlog\circle.lastbuildstate

?????文件????????604??2017-09-21?13:47??circle\circle\x64\Debug\circle.tlog\CL.command.1.tlog

?????文件??????17658??2017-09-21?13:47??circle\circle\x64\Debug\circle.tlog\CL.read.1.tlog

?????文件????????504??2017-09-21?13:47??circle\circle\x64\Debug\circle.tlog\CL.write.1.tlog

?????文件???????1528??2017-09-21?13:47??circle\circle\x64\Debug\circle.tlog\link.command.1.tlog

?????文件???????3816??2017-09-21?13:47??circle\circle\x64\Debug\circle.tlog\link.read.1.tlog

?????文件????????480??2017-09-21?13:47??circle\circle\x64\Debug\circle.tlog\link.write.1.tlog

?????文件?????235008??2015-03-14?16:02??circle\circle\x64\Debug\freeglut.dll

?????文件??????31149??2017-09-21?13:47??circle\circle\x64\Debug\sourcecpp.obj

?????文件?????355328??2017-09-21?13:47??circle\circle\x64\Debug\vc141.idb

?????文件?????126976??2017-09-21?13:47??circle\circle\x64\Debug\vc141.pdb

?????文件???????1430??2017-09-20?19:14??circle\circle.sln

............此處省略22個文件信息