# Write a C Program to find the roots of quadratic equation

By | 02.11.2016

## 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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