Update C++ lol

#include "glut.h"
#include <stdio.h>

void main
(int argc, char*argv[])
{glutInit (&argc, argv);
 glutInitDisplayMode (Glut_RGB);
glutInitWindowPosition (0,0);
glutInitWindowSize (500,500);
glutCreateWindow ("Look at me");
glutDisplayFunc (disp);
glutKeyboardFunc (keyb);
glutMainLoop(900);

Void disp(void){
	glClearColor(0,0,0,1);
	glClear(GL_COLOR_BUFFER_GL);
	glBegin(GL_LINES);
	glvertex3f(x0,y0,z0);
    glvertex3f(x1,y1,z1);
glEnd();
glFinish;}
void keyb(unsigned char)