star

void star()
{

    int x[5], y[5];
    float goc = (float)-90*M_PI/180;    // xac dinh goc ban dau
    int R = 100;
    int x0 = getmaxx()/2, y0 = getmaxy()/2;
    for (int i=0; i<5; i++)     // xac dinh toa do 5 dinh ngoi sao
    {
        x[i] = x0 + (int)(R*cos(goc)+0.5);
        y[i] = y0 + (int)(R*sin(goc)+0.5);
        goc += (float)72*M_PI/180;
    }
    for (int i=0, j = 4; i<5; i++)  // Ve cac duong thang noi canh ngoi sao
    {
        delay(DELAY);
        lineBresenham(x[j],y[j],x[(j+2)%5],y[(j+2)%5]);
        j = (j + 2)%5;
    }

    int fun = 30;
    delay(DELAY*fun); setcolor(color);  // dat mau cho ngoi sao.
    delay(DELAY*fun); floodfill(x0,y0,color);       // to mau vung giua
    delay(DELAY*fun); floodfill(x0, y0 - R/3 - 1,color);        // to mau canh tren
    delay(DELAY*fun); floodfill(x0 - R/3 - 1, y0,color);        // to mau canh trai
    delay(DELAY*fun); floodfill(x0 + R/3 + 1, y0,color);        // to mau canh phai
    delay(DELAY*fun); floodfill(x0 - R/3 - 1, y0 + R/3,color);// to mau canh trai duoi
    delay(DELAY*fun); floodfill(x0 + R/3 - 1, y0 + R/3 + 1,color);  // to mau canh phai duoi
}