Thread: Identifying conic sections

Hey guys, I'm a beginner, and I need help, I just finished a program on how to Identify any kinds of conic sections like circle,hyperbola, parabola and ellipse.
I dont about the other codes, they work but I think they are wrong, please help me, I need to finish so that I can proceed to another program, I need to find what is the wrong in this equation, I dont know why the answer for eccentricity and others are different If I solved it manually. please guys help me..

this is my program:

Code:

#include<>
#include<>main()
{
   int A,B,C;
   float E,L,D,P;
   clrscr();
   printf("Enter A:\n");
   scanf("%d",&A);
   printf("Enter B:\n");
   scanf("%d",&B);
   printf("Enter C:\n");
   scanf("%d",&C);
   printf("\nThis is the General Equation of all Curves: Ax^2+By^2+Cxy+Dx+Ey+F=0");
   printf("\nThis Equation is a:");


   if ( A==B || C==0 )
      printf("\tCircle");
   else if ( A==0 && C>0 || C==0 && A>0)
      {
      printf("\tParabola");
      printf("\n\ny^2 = 4ax");
      E=1.0;
      printf("\n\nEccentricity:%f",E);
      L= 4*A;
      printf("\nLatus Rectum:%f",L);
      }
   else if ((B^2)-4*A*C<0)
      {
      printf("\tEllipse");
      printf("\n\n(x/a)^2 + (y/b)^2 = 1");
      E= sqrt (1-(B/A)^2);
      printf("\n\nEccentricity:%f",E);
      D= sqrt ((B^2)-(A^2));
      printf("\nLinear Eccentricity:%f",D);
      L= 2*B^2/A;
      printf("\nLatus Rectum:%f",L);
      P= B^2/sqrt (B^2-A^2);
      printf("\nFocal Parameter:%f",P);
      }
   else if ((B^2)-4*A*C>0)
      {
      printf("\tHyperbola");
      printf("\n\n(x/a)^2 - (y/b)^2 = 1");
      E= sqrt (1+(B/A)^2);
      printf("\n\nEccentricity:%f",E);
      D= sqrt ((B^2)+(A^2));
      printf("\nLinear Eccentricity:%f",D);
      L= 2*B^2/A;
      printf("\nLatus Rectum:%f",L);
      P= B^2/sqrt (B^2+B^2);
      printf("\nFocal Parameter:%f",P);
      }
   getch();
   return 0;
}

oh ok, then I will change it to && then??.

I base on this site about the general form of this program Conics General Form

ROFL! < This is a "Latus Rectum" >? ROFL!

^ is bitwise operator right ?

Originally Posted by loserone+_+

^ is bitwise operator right ?

I don't know, I'm just a beginner I manage to made the program running but I don't know if it is the right codes..

can you teach me the right codes?? or can you pin point the wrong ones in my program?? please

Originally Posted by grumpy

Well look it up.

vart and loserone gave you a hint as to one of the things wrong with your program.

I'll give another: A, B, and C are all defined in your code as ints. Your code calculates B/A in a few places. That does integer division, which produces an integral result. So 3/2 will give the result of 1, not 1.5.

Every basic textbook on C describes what the ^ operator does, and also describes how integer division works. You will learn more by working out what is going on. The hints you've been given are sufficient to get you started. You might have to work a bit, but you WILL learn in the process. Whereas, if people just fix your code, you will learn NOTHING.

oh I see now where I'm wrong, thanks guys for the clues, I REALLY APPRECIATE IT, THANK YOU SO MUCH, Now I understand how ^ and int works, hmm.. maybe I need some tutorial about C programming after all.. hehehe