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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.



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,

 	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;



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

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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 20:28
professionalvtorri15-Nov-10 20:28 
GeneralReason for my vote of 1 Low quality code, poor instructions ... Pin
BillW3310-Nov-10 9:43
professionalBillW3310-Nov-10 9:43 
GeneralReason for my vote of 1 Is this from a 8 year old? Pin
sisira9-Nov-10 16:08
sisira9-Nov-10 16:08 
GeneralReason for my vote of 2 Can crash ! Pin
YvesDaoust9-Nov-10 0:26
YvesDaoust9-Nov-10 0:26 
GeneralReason for my vote of 1 A major problem is it doesn't preven... Pin
Andrew Phillips7-Nov-10 16:01
Andrew Phillips7-Nov-10 16:01 
GeneralReason for my vote of 1 There are so many things wrong with ... Pin
Saurabh.Garg6-Jun-10 21:21
Saurabh.Garg6-Jun-10 21:21 

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