Run this program to draw a line using codeblock and link it with -lfreeglut,-lopengl32 and -lglu32

```
#include<bits/stdc++.h>
#include <GL/glut.h>
double X1, Y1, X2, Y2;
float round_value(float v)
{
return floor(v + 0.5);
}
void LineDDA(void)
{
double dx=(X2-X1);
double dy=(Y2-Y1);
double steps;
float xInc,yInc,x=X1,y=Y1;
steps=(abs(dx)>abs(dy))?(abs(dx)):(abs(dy));
xInc=dx/(float)steps;
yInc=dy/(float)steps;
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_POINTS);
glVertex2d(x,y);
int k;
for(k=0;k<steps;k++)
{
x+=xInc;
y+=yInc;
glVertex2d(round_value(x), round_value(y));
}
glEnd();
glFlush();
}
void Init()
{
glClearColor(1.0,1.0,1.0,0);
glColor3f(0.0,0.0,0.0);
gluOrtho2D(0 , 640 , 0 , 480);
}
int main(int argc, char **argv)
{
printf("Enter two end points:\n");
scanf("%lf %lf %lf %lf",&X1,&Y1,&X2,&Y2);
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowPosition(0,0);
glutInitWindowSize(640,480);
glutCreateWindow("DDA_Line");
Init();
glutDisplayFunc(LineDDA);
glutMainLoop();
return 0;
}
```