Program to calculate all possible roots of a quadratic equation.

Program to calculate all possible roots of a quadratic equation.

Program Code:

#include<stdio.h>

#include<conio.h>

#include<math.h>

int main()

{

float a, b, c, disc;

float root1,root2,real,imag;

clrscr();

printf("Enter a,b,c values\n");

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

if( (a == 0) && (b == 0) &&(c==0))

{

printf("Invalid coefficients\n");

printf(" Try Again with valid inputs !!!!\n");

getch();

}

disc = b*b - 4*a*c;

if(disc == 0)

{

printf("The roots are real and equal\n");

root1 = root2 = -b/(2*a);

printf("Root1 = %.3f \nRoot2 = %.3f", root1,root2);

}

else if(disc>0)

{

printf("The roots are Real and Distinct\n");

root1 = (-b+sqrt(disc)) / (2*a);

root2 = (-b-sqrt(disc)) / (2*a);

printf("Root1 = %.3f \nRoot2 = %.3f",root1,root2);

}

else

{

printf("The roots are Real and Imaginary\n");

real = -b / (2*a);

imag = sqrt(fabs(disc)) / (2*a);//fabs() returns only numberignoring sign

printf("Root1 = %.3f + i %.3f \n",real,imag);

printf("Root2 = %.3f - i %.3f",real,imag);

}

getch();

}