//Quiz1 ¢éÍ 2.4

# include
# include
# include

init (){
	glClearColor(1.0,1.0,1.0,1.0);
	glMatrixMode(GL_PROJECTION);
	gluOrtho2D(0.0,200.0,0.0,150.0);
}

void display (){
	glClear(GL_COLOR_BUFFER_BIT);
	glBegin(GL_POLYGON);
	glColor3f(1.0,0.0,0.0);
//	glVertex2f(-1.00*40+100,0.00*40+100);
//	glVertex2f(-0.707*40+100,0.707*40+100);
//	glVertex2f(0.0*40+100, 1.0*40+100);
//	glVertex2f(0.707*40+100,0.707*40+100);
	glVertex2f(1.0*40+100,0.0*40+100);
	glVertex2f(0.707*40+100,-0.707*40+100);
	glVertex2f(0.0*40+100, -1.0*40+100);
	glVertex2f(-0.707*40+100,-0.707*40+100);

	glEnd();
	glFlush();
}

void main(int argc,char **argv){
	glutInit(&argc,argv);
	glutInitDisplayMode(GLUT_SINGLE?GLUT_RGB);
	glutInitWindowPosition(50,100);
	glutInitWindowSize(800,600);
	glutCreateWindow("By 3/4N~^(1)?i`.3/4");
	init();
	glutDisplayFunc(display);
	glutMainLoop();
} 


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