Draw a star2 using OpenGL

 #include<GL/glut.h>

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
void drawCircle(float radius,int start,int end,float x1, float y1)
{
 float angle = 0;
 float x2,y2,cx,cy,fx,fy;
 int cache = 0;
	glEnable(GL_LINE_SMOOTH);
	glLineWidth(10.0);
 glBegin(GL_LINES);
 for (angle = start; angle < end; angle+=1.0) {
  float rad_angle = angle * 3.14 / 180;
  x2 = radius * sin((double)rad_angle);
  y2 = radius * cos((double)rad_angle);
  if (cache) {
  //glVertex2f(0.0,0.0);
   glVertex2f(cx,cy);
   glVertex2f(x2,y2);
  } else {
   fx = x2;
   fy = y2;
  }
  cache = 1;
     cx = x2;
  cy = y2;
 }
 //glVertex2f(0.0,0.0);
 //glVertex2f(x2,y2);
 //glVertex2f(fx,fy);
 glEnd();
}

void display(void)
{
	glClearColor(1.0,1.0,1.0,0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	glLoadIdentity();
	glTranslatef(-10,0,-30);
	glColor3ub(253,77,44);
	drawCircle(5,,180,0,0);
	glutSwapBuffers();
	
}
void reshape (int w, int h) {
 glViewport (0, 0, (GLsizei)w, (GLsizei)h);
 glMatrixMode (GL_PROJECTION);
 glLoadIdentity ();
 gluPerspective (60, (GLfloat)w / (GLfloat)h, 0.1, 100.0);
 glMatrixMode (GL_MODELVIEW);
}

int main (int argc, char **argv) {
 glutInit (&argc, argv);
 glutInitDisplayMode (GLUT_DOUBLE);
 glutInitWindowSize (1200, 800);
 glutInitWindowPosition (0, 0);
 glutCreateWindow ("lol");
 //init();
 glutDisplayFunc (display);
 //glutIdleFunc (display);
   glutReshapeFunc (reshape);
 //glutKeyboardFunc (keyboard);
 glutMainLoop ();
 return 0;
}