Program for Calculating Roots of a Quadratic Equation

# include<stdio.h>

#include<conio.h>

#include<math.h>

main ( )

{

int a, b, c, d;

float r, r₂;

printf (“enter a, b, c values”);

scanf (“%d%d%d”, & a, & b ,& c);

d= b * b – 4 * a * c;

if (d > 0)

{

printf(“ \n roots are real & different”);

r₁=(–b + sqrt (d) )/ 2 * a;

r₂= (–b – sqrt (d)) / 2 * a;

printf (“\n roots r₁= % f \t r₂= % f “ ,r₁,r₂);

}

if (d = = 0)

{

printf(“\n roots are real and same”);

r1=-b/(2*a);

r2=r1;

printf ("\n roots r₁=% f \t r₂= % f”, r₁,r₂);

}

else

printf (“\n roots are imaginary”);

getch ( ) ;

}

Out Put:

enter a,b,c values 2 3 5

roots are imaginary

enter a,b,c values 1 2 1

roots are real and same

r1=-1.0000     r2=-1.0000