#include?
#include?
#include?
#include?
#include?

//#include?

using?namespace?std;

//points保存點
vector?>?points;

//畫直線
void?drawLine（）?{
????glColor3f（1.0f?0?0）;
????glPointSize（1.0）;
????for?（int?i?=?0;?i?<=?5;?i?++）?{
????????glBegin（GL_LINES）;
????????????glVertex2f（points[i].first?points[i].second）;
????????????glVertex2f（points[i+1].first?points[i+1].second）;?
????????glEnd（）;
????}
}

//貝塞爾曲線
void?drawCurve（）?{
????glColor3f（0?1.0f?0）;
????glPointSize（1.0）;
	double?F03F13F23F33;
	for?（int?i?=?0;?i<=3;?i++）{
		for?（GLfloat?t?=?0;?t?<=?1.0;?t?+=?0.001）?{
			F03?=?（-t*t*t+3*t*t-3*t+1）/6;
			F13?=?（3*t*t*t-6*t*t+4）/6;
			F23?=?（-3*t*t*t+3*t*t+3*t+1）/6;
			F33?=?t*t*t/6;
			GLfloat?x?=?points[i].first*F03?+?points[i+1].first*F13?+?points[i+2].first*F23?+?points[i+3].first*F33;
			GLfloat?y?=?points[i].second*F03?+?points[i+1].second*F13?+?points[i+2].second*F23?+?points[i+3].second*F33;
			glBegin（GL_POIN