C Program to find out the roots of quadratic equation by method 2

Assignment 1

//here we have to find out the roots of quadratic equation
#include
#include
#include
int main()
{
    float x,y,z,d,r1,r2,r3,r4,r5;
    printf("please enter the value of x,y,z = \n ----------------------- \n");
    scanf("%f %f %f",&x,&y,&z);//enter values of x y and z
    d=(y*y)-(4*x*z);//formula for finding the roots
    if(d<0)
    {
           printf("the roots are complex");
           r4=-y/(2*x);
           r5=sqrt(-d)/(2*x);
           printf("    the roots are %f +i %f \n",r4,r5);
           printf("%f - i%f \n",r4,r5);

           }
          else
           if(d==0)
           {
                   printf("the roots are real and equal");
                   r1=-y/(2*x);
                   printf("the root is %f",r1);
                   }
                   else
                   {
                       printf("the roots are real and equal");
                       r2=(-y+sqrt(d))/(2*x);
                       r3=(-y-sqrt(d))/(2*x);
                       printf("the roots are %f %f",r2,r3);
                       }
                       getch();
                       return 0;
                       }