#include <GL/glut.h>
#include <iostream>
using namespace std;

void disp(void);
void drawAxis(void);

int main(int argc,char **argv){

  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
  glutCreateWindow("Axis1");
  glClearColor(0.0,0.0,0.0,0.0);
  glutDisplayFunc(disp);
  glutMainLoop();
}



void disp(void){
  glClear(GL_COLOR_BUFFER_BIT);
  drawAxis();
  glutSwapBuffers();
}


void drawAxis(){
  glBegin(GL_LINES);
  glColor3f(1.0,0.0,0.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.80,0.0,0.0);
  glColor3f(0.0,1.0,0.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.0,0.80,0.0);
  glColor3f(0.0,0.0,1.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.0,0.0,0.80);
  glEnd();
}