Program to finding the roots of quadratic equation

1397
```#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
float a,b,c,d,root1,root2;
clrscr();
printf("Enter a b c \n");
scanf("%f%f%f",&a,&b,&c);
d=b*b-4*a*c;   /* finding determinant */
if(d==0)      /* when d is 0 both the roots will be equal */
{
printf("\n roots are equal \n");
root1=root2=-b/(2*a);
printf("root1=%.3f \n root2=%.3f", root1,root2);
}
else
if(d>0)     /* roots are real and distinct */
{
printf("\n roots are real and distinct \n");
root1=(-b+sqrt(d))/(2*a);
root2=(-b-sqrt(d))/(2*a);
printf("root1=%.3f\n root2=%.3f",root1,root2);
}
/* when d is -ve it is not possible to take the squareroot of -ve number,
we have to take absolute value of d */
else
{
printf("\n roots are imaginary \n");
root1=-b/(2*a);
root2=sqrt(-d)/(2*a);
printf("real part=%.3f \n imaginary part = %.3f", root1,root2);
}
getch();
}
Output 1:
Enter a b c
2 2 2
roots are imaginary
real part=-0.500
imaginary part=0.866

Output 2:
Enter a b c
2 5 1
roots are real and distinct
root1=-0.219
root2=-2.281

Output 3:
Enter a b c
1 2 1
roots are equal
root1=-1.000
root2=-1.000```

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