Code:
#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, it is not a quadratic equation */
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 +i %f\n", realp, imagp);
printf("Root2 = %f -i %f\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
45 50 65
Imaginary Roots
Root1 = -0.555556 +i 1.065740
Root2 = -0.555556 -i 1.065740
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