Write a C Program to find the roots of the Quadratic Equation ax2+bx+c

Source Code :

#include<stdio.h>

#include<math.h>

void main()

{

    float a,b,c,dd,d,x,y;

    clrscr();

    printf("Enter the Values of a,b,c of a Quadratic Equation : ");

    scanf("%f %f %f",&a,&b,&c);

    if(a!=0)

    {

        dd=(b*b)-(4*a*c);

        if(dd<0)

        {

            printf("\n\n\t\tThe Roots are Imaginary");

            dd=-dd;

            d=sqrt(dd);

            x=(-b+d)/(2*a);

            y=(-1)*(-b-d)/(2*a);

            printf("\n\nThe two roots of the Quadratic Equation are :

             x=%5.2f(i) and y=%5.2f(i)",x,y);

        }

        else

        {

             d=sqrt(dd);

             x=(-b+d)/(2*a);  //Calculation of x & y

             y=(-b-d)/(2*a);

             printf("\n\nThe two roots of the Quadratic Equation are :

                                    x=%5.2f and y=%5.2f",x,y);

        }

    }

    else

    {

      printf("\n\n\t\t The Value of 'a' Cannot be 0. Retry ");

    }

     getch();

}


Output :

Enter the Values of a,b,c of a Quadratic Equation : 6 2 3

            The Roots are Imaginary

The Two Roots of the Quadratic Equation are : x=0.52(i) and y=0.85(i)