## Alternatives

Members may post updates or alternatives to this current article in order to show different approaches or add new features.

16 Nov 2010

Alain Rist

I prefer this :) #include #include #include #include static const double bad_double = std::numeric_limits::quiet_NaN();class QuadSolver{ static bool IsZero(double val) { return (val == 0) || (fabs(val) <...

8 Nov 2010

Anshul R

Simple and prints imaginary roots too!float a,b,c,x1,x2,d,dsq;printf("ax^2 + bx + c = 0");printf("\nEnter a,b,c separated by commas : \n");scanf("%f,%f,%f",&a,&b,&c);d = b*b-(4*a*c);if(d>=0){dsq=sqrt(d);x1 = (-b+dsq)/(2*a);x2 = (-b-(dsq))/(2*a);printf("\nRoot 1 : %f\nRoot 2...

9 Nov 2010

YvesDaoust

// Real solutions of the quadratic equation A x^2 + B x + C = 0// Returns two roots (possibly identical) in increasing order, or nonebool Quadratic(double A, double B, double C, double R[2]){ if (A == 0) { // Linear, impossible or degenerate, cannot find two roots ...

10 Nov 2010

federico.strati

The correct way to solve quadratic equations is none of the above. For the correct algorithm as applied in the following function, seenumerical recipes in C and the Wolfram site at http://mathworld.wolfram.com/QuadraticEquation.html#include bool quadratic(double a, double b,...

20 May 2010

ReymonARG

#include #include #include "Raiz_Cuadratica.h"int main(){ // float xx = 1; float x = 1; float i = -12; RaizCuadratica *lala = new RaizCuadratica( xx, x, i ); RaizCuadratica::sRaiz raiz = lala->GetRaiz(); printf( "x1 = %f || x2 = %f\n\n",...

11 Nov 2010

Software_Developer

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...

15 Nov 2010

Michael Waters

I am reposting this because I accidentally deleted my first post.The solution is presented as a pair of complex roots, unless a == 0, in which case the equation is linear and returns a single complex(real) root.If a == 0 and b == 0, the function fails.Given a complex type, replace...