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This program will create a  virus in your sysem.
#include <stdio.h>
#include <math.h>
#include <conio.h>

int main()
{
   clrscr();
   double f,g,m,x1,x2,x3,y1,y2,y3;
   double c,d,h,e,k,r,s;
   for(;
   {
if(scanf("%lf %lf %lf %lf %lf %lf",&x1,&y1,&x2,&y2,&x3,&y3)==EOF)
//checking for input
      break;

f = x3*x3-x3*x2-x1*x3+x1*x2+y3*y3-y3*y2-y1*y3+y1*y2; //formula
g = x3*y1-x3*y2+x1*y2-x1*y3+x2*y3-x2*y1;

   if(g==0)
      m = 0;
   else
      m = (f/g);

   c = (m*y2)-x2-x1-(m*y1);   //formula
   d = (m*x1)-y1-y2-(x2*m);
   e = (x1*x2)+(y1*y2)-(m*x1*y2)+(m*x2*y1);

   h = (c/2);         //formula
   k = (d/2);
   s = (((h)*(h))+((k)*(k))-e);
   r = pow(s,.5);

   printf("(x");

   if(h>=0)
      printf(" + ");
   else if(h<0)
      printf(" - ");
   if(h<0)
      h=-h;
   printf("%.3lf)^2",(h));
   printf(" + ");
   printf("(y");
   if(k>=0)
      printf(" + ");
   else if(k<0)
      printf(" - ");
   if(k<0)
      k=-k;
   printf("%.3lf)^2 = %.3lf^2",(k),r);

   printf("
");

   printf("x^2 + y^2");

   if(c>=0) printf(" + ");
   else if(c<0) printf(" - ");

   if(c<0) c=-c;
   printf("%.3lfx",c);

   if(d>=0) printf(" + ");
   else if(d<0) printf(" - ");

   if(d<0) d=-d;
   printf("%.3lfy",d);

   if(e>=0) printf(" + ");
   else if(e<0) printf(" - ");

   if(e<0) e=-e;
   printf("%.3lf = 0",e);
   printf("

");
   }

   getch();
   return 0;
}

hey..coooool man...wat kind of virus is going to generate and it should be harm more or affecting some exe files..

Have you try somewhere murugan