C program to find the roots of a quadratic equation

#include<stdio.h>

#include<conio.h>

#include<math.h>

void main()

{

float a,b,c,x1,x2,d;

clrscr();

printf("Enter the values a, b and c for the equation ax^2+bx+c=0:\n");

scanf("%f%f%f",&a,&b,&c);

d=(b*b)-(4*a*c);

if(d==0)

{

x1=x2=(-b)/(2*a);

printf("Roots are real and equal, x1=x2=%f",x1);

}

else if (d>0)

{

x1=((-b)+sqrt(d))/(2*a);

x2=((-b)-sqrt(d))/(2*a);

printf("Roots are distinct, x1=%f, x2=%f",x1,x2);

}

else

printf("Roots are imaginary");

getch();

}