C Program to Find all Roots of a Quadratic Equation - IProgramX

Q, Write a program to calculate the roots of a quadratic equation. Consider all possible cases

Program 

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

void main()
{
    float a, b, c, root1, root2;
    float realp, imagp, disc;

    printf("Enter the values of a, b and c \n");
    scanf("%f %f %f", &a, &b, &c);
    if (a == 0 || b == 0 || c == 0)
    {
        printf("Error: Roots cannot be determined \n");
        exit(1);
    }
    else
    {
        disc = b * b - 4.0 * a * c;
        if (disc < 0)
        {
            printf("Imaginary Roots\n");
            realp = -b / (2.0 * a) ;
            imagp = sqrt(abs(disc)) / (2.0 * a);
            printf("Root1 = %f + %fi\n", realp, imagp);
            printf("Root2 = %f - %fi\n", realp, imagp);
        }
        else if (disc == 0)
        {
            printf("Roots are real and equal\n");
            root1 = -b / (2.0 * a);
            root2 = root1;
            printf("Root1 = %f\n", root1);
            printf("Root2 = %f\n", root2);
        }
        else if (disc > 0 )
        {
            printf("Roots are real and distinct \n");
            root1 =(-b + sqrt(disc)) / (2.0 * a);
            root2 =(-b - sqrt(disc)) / (2.0 * a);
            printf("Root1 = %f  \n", root1);
            printf("Root2 = %f  \n", root2);
        }
    }
}

Output:

Enter the values of a, b and c
4 7 2
Roots are real and distinct
Root1 = -0.359612
Root2 = -1.390388