C Code Snippets 2 - Finding Roots of Quadratic Equations



Hello everyone, in this post I am going to share a flow chart and a source code on how to find the roots of a quadratic equation. I think the flow chart and the code are self-explanatory. If you have any questions do not hesitate to write a comment below.



/**
* Author : Berk Soysal
*/

#include <stdio.h>
#include <math.h> /* This is needed to use sqrt() function.*/
void main()
{
    float a, b, c, delta, r1,r2, real, imag;
    printf("Enter coefficients a, b and c: ");
    scanf("%f%f%f",&a,&b,&c);

    if(a ==0 || b==0)
    {
        printf("\n\nPlease enter nonzero values !\n");
    }

    else
    {
        delta=b*b-4*a*c;
        if (delta>0)
        {
            r1= (-b+sqrt(delta))/(2*a);
            r2= (-b-sqrt(delta))/(2*a);
            printf("\n\nRoots are: %.2f and %.2f\n\n",r1 , r2);
        }
        else if (delta==0)
        {
            r1 = r2 = -b/(2*a);
            printf("\n\nRoots are: %.2f and %.2f\n\n", r1, r2);
        }
        else
        {
            real= -b/(2*a);
            imag = sqrt(-delta)/(2*a);
            printf("\n\nRoots are: %.2f + %.2fi and %.2f - %.2fi\n\n", real, imag, real, imag);
        }

    }
}

Keywords: CCode Snippets
Author:

Software Developer, Codemio Admin


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