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Posted 16 May 2010

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A simple program to solve quadratic equations with

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11 Nov 2010CPOL
A simple program to calculate quadratic equation with.Input MUST have the format:AX2 + BX + C = 0EXAMPLE: input the equation 2X2 + 4X -30 = 0 as:A= 2 B= 4 C= -30The answers for AX2 + BX + C = 0 should be 3 and -5.x1=3x2=-5 bool solver(float...
A simple program to calculate quadratic equation with.


Input MUST have the format:
AX2 + BX + C = 0


EXAMPLE: input the equation
2X2 + 4X -30 = 0 as:


A= 2 B= 4 C= -30


The answers for AX2 + BX + C = 0 should be 3 and -5.

x1=3

x2=-5


bool solver(float a,float b, float c, float &x1, float &x2)
{
	float delta = sqrt( (b*b) - (4*a*c) );

    if (!a)  return false; 
 
    x1 = ( -b + delta)/(2*a);
    x2 = ( -b - delta)/(2*a);

	return true;
}


int main()
{
	float a=2,
              b=4,
              c=-30; 
	

/*
 	printf("a = ");
	scanf("%f", &a);
	printf("b = ");
	scanf("%f", &b);
	printf("c = ");
	scanf("%f", &c);

*/

float x1,x2;
if ( solver(a, b ,c, x1, x2) ) 	printf("x1=%f\nx2=%f\n",x1,x2);
 
return 0;
} 


...

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Sweden Sweden
About me:
I attended programming college and I have a degree in three most famous and successful programming languages. C/C++, Visual Basic and Java. So i know i can code. And there is a diploma hanging on my wall to prove it.
.
I am a professional, I am paid tons of cash to teach or do software development. I am roughly 30 years old .

I hold lectures in programming. I have also coached students in C++, Java and Visual basic.

In my spare time i do enjoy developing computer games, and i am developing a rather simple flight simulator game
in the c++ programming language using the openGL graphics libray.

I've written hundreds of thousands of code syntax lines for small simple applications and games.

Comments and Discussions

 
GeneralReason for my vote of 1 delta can be negative a=c=1E-8 and ... Pin
vtorri15-Nov-10 19:28
professionalvtorri15-Nov-10 19:28 
GeneralReason for my vote of 1 Low quality code, poor instructions ... Pin
BillW3310-Nov-10 8:43
professionalBillW3310-Nov-10 8:43 
GeneralReason for my vote of 1 Is this from a 8 year old? Pin
sisira9-Nov-10 15:08
Membersisira9-Nov-10 15:08 
GeneralReason for my vote of 2 Can crash ! Pin
YvesDaoust8-Nov-10 23:26
MemberYvesDaoust8-Nov-10 23:26 
GeneralReason for my vote of 1 A major problem is it doesn't preven... Pin
Andrew Phillips7-Nov-10 15:01
MemberAndrew Phillips7-Nov-10 15:01 
GeneralReason for my vote of 1 There are so many things wrong with ... Pin
Saurabh.Garg6-Jun-10 20:21
MemberSaurabh.Garg6-Jun-10 20:21 

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