Quadratic Equation Solver


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

void main()
{
   int a, b, c, d;
   float x1, x2, real, img;
 
   printf("Input the values of a, b & c: ");
   scanf("%d%d%d", &a, &b, &c);
   
   if (a == 0 && b == 0)
   {
       printf("Invalid inputs\n");
   }
   else if (a == 0)
   {
       printf("Linear equation\n");
       x1 = -c / (float)b;
       printf("Linear equation is: %f\n", x1);
   }
   else
   {
       d = b * b - 4 * a * c;
       
       if (d == 0)
       {
           printf("Both roots are equal.\n");
           x1 = -b / (2.0 * a);
           x2 = x1;
           printf("First Root Root1= %f\n", x1);
           printf("Second Root Root2= %f\n", x2);
       }
       else if (d > 0)
       {
           printf("Both roots are real and different.\n");
           x1 = (-b + sqrt(d)) / (2 * a);
           x2 = (-b - sqrt(d)) / (2 * a);
           printf("First Root Root1= %f\n", x1);
           printf("Second Root Root2= %f\n", x2);
       }
       else
       {
           printf("Roots are imaginary.\n");
           real = -b / (2 * a);
           img = sqrt(fabs(d)) / (2 * a);
           printf("Root 1: %f + %fi\n", real, img);
           printf("Root 2: %f - %fi\n", real, img);
       }
   }
}