Program To Sort Graphic Lines

[lifeisgreat20009]

I want to make a "GRAPHICS PROGRAM" in C language that shows sorting of lines. Something like this:-

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after sorting the lines should appear as follows on the screen :-

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NOTE :- The lines are to be drawn USING LINE() FUNCTION . Also the lines are to be sorted using quick sort algorithm. THESE ARE NOT DASHES, THESE ARE GRAPHICAL LINES SIMILAR TO WHAT WE DRAW IN PAINTBRUSH.

Any help would be greatly appreciated.
Thanks !!!!!


I have tried it but it fails to work . The code is below !!!!!!

#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
 
int main(void)
{
   /* request auto detection */
   int gdriver = DETECT, gmode, errorcode;
 
   int x1=50,y1=50,x2=100,y2=50,x3=70,y3=70,x4=150,y4=70;  
   int x5=30,y5=90,x6=50,y6=90,i,l[3],temp,midx,midy;
 
 
 
   /* initialize graphics and local variables */
   initgraph(&gdriver, &gmode, "");
 
   /* read result of initialization */
   errorcode = graphresult();
   /* an error occurred */
   if (errorcode != grOk)
   {
      printf("Graphics error: %s\n", grapherrormsg(errorcode));
      printf("Press any key to halt:");
      getch();
      exit(1);
   }
   midx=getmaxx()/2;
   midy=getmaxy()/2;
   outtextxy(midx-50,10,"UNSORTED LINES");
   outtextxy(midx-50,midy-130,"SORTED LINES");
   line(0,0,getmaxx(),0);
    line(getmaxx(),0,getmaxx(),getmaxy());
    line(getmaxx(),getmaxy(),0,getmaxy());
    line(0,0,0,getmaxy());
 
   setcolor('5');
   line(x1,y1,x2,y2);
   line(x3,y3,x4,y4);
   line(x5,y5,x6,y6);
 
   l[0]=x2-x1;
   l[1]=x4-x3;
   l[2]=x6-x5;
   delay(1000);
   for(i=0;i<=2;i++)
   {
   if(l[i]>l[i+1])
   {
   temp=l[i];
   l[i]=l[i+1];
   l[i+1]=temp;
 
   }  }        delay(1000);
 
   line(x1,y1+110,l[0]+x1,y1+110); delay(1000);
   line(x1,y1+130,l[1]+x1,y1+130);   delay(1000);
   line(x1,y1+150,l[2]+x1,y1+150);
 
 
   getch();
   closegraph();
   return 0;
}

[sicarie]

It looks like you have the coordinates of the lines in your program. Why not just compare the x's?