Write a C Program to find the roots of quadratic equation

Find Roots of quadratic equation


Write a C Program to find the roots of quadratic equation. Here’s simple Program to find the roots of quadratic equation in C Programming Language.


Nature of roots of quadratic equation can be known from the quadrant = b24ac

  • If b24ac >0 then roots are real and unequal
  • If b24ac =0 then roots are real and equal
  • If b24ac <0 then roots are imaginary

Below is the source code for C Program to find the roots of quadratic equation which is successfully compiled and run on Windows System to produce desired output as shown below :


SOURCE CODE : :


/*  C Program to find the roots of quadratic equation  */

#include<stdio.h>
#include<math.h>

int main()
{
    int A, B, C;
    float disc, deno, x1, x2;
    printf("ENTER THE VALUE OF A :: ");
    scanf("%d", &A);
    printf("\nENTER THE VALUE OF B :: ");
    scanf("%d",&B);
    printf("\nENTER THE VALUE OF C :: ");
    scanf("%d",&C);

    disc=(B*B)-(4*A*C);
    deno = 2 * A;
    if(disc > 0)
    {
    printf("\nTHE ROOTS ARE REAL ROOTS.");
    x1 = (-B/deno)+(sqrt(disc)/deno);
    x2 = (-B/deno)-(sqrt(disc)/deno);
    printf("\n\nTHE ROOTS ARE :: %f and %f\n", x1, x2);
    }
    else if(disc == 0)
    {
    printf("\nTHE ROOTS ARE REPEATED ROOTS.");
    x1 = -B/deno;
    printf("\n\nTHE ROOT IS :: %f\n", x1);
    }
    else
    printf("\nTHE ROOTS ARE IMAGINARY ROOTS.\n");

    return 0;
}

OUTPUT : :


/*  C Program to find the roots of quadratic equation  */

***************** OUTPUT *************

ENTER THE VALUE OF A :: 1

ENTER THE VALUE OF B :: 6

ENTER THE VALUE OF C :: 8

THE ROOTS ARE REAL ROOTS.

THE ROOTS ARE :: -2.000000 and -4.000000

Above is the source code for C Program to find the roots of quadratic equation which is successfully compiled and run on Windows System.The Output of the program is shown above .

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