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A simple program to solve quadratic equations with

, 8 Nov 2010 CPOL
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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...
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 : %f",x1,x2);
}
if(d<0)
{
d = ((4*a*c)-pow(b,2))/(2*a);
printf("\nRoot 1 : %f+%fi",((-b)/(2*a)),d);
printf("\nRoot 2 : %f-%fi",((-b)/(2*a)),d);}

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

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About the Author

Anshul R
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India India
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Comments and Discussions

 
GeneralThank you for the suggestion.. I do not wish to be rude. If... Pin
pranav958-Nov-10 1:13
memberpranav958-Nov-10 1:13 
Thank you for the suggestion..

I do not wish to be rude. If I am, I'm really sorry.

1) In a quadratic equation, 'a' can never be 0. So, where can a division by zero problem occur?
2) Taking square root twice is not a big issue.. It is computed in a matter of seconds.. I do agree it is inefficient in the extreme case..
3) An alternative can have an improved feature.

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