Quatratic Equation Using C

QUADRATIC EQUATION USING C

Program:

#include<stdio.h>

#include<conio.h>

#include<math.h>

void main()

{

void quad(int a, int b ,int c);

int a,b,c;

float r;

clrscr();

printf(“Enter values of a,b,c of a quadratic equation:\n” );

scanf(“%d%d%d”,&a,&b,&c);

quad(a,b,c);

getch();

}

void quad(int a, int b ,int c)

{

float d,r1,r2,r3,r4,r;

d=(b*b)-(4*a*c);

switch(d)

{

case <0:

 printf(“Value of Discriminant is negative” );

break;

case 0:

printf(“ Roots are real” );

r=-b/2*a;

printf(“ First and Second root of equation:%d,r” );

break;

default:

r1=-b+sqrt(d);

r2=2*a;

r=r1/r2;

r3=-b-sqrt(d);

r4=r3/r2;

break;

printf(“First root of equation: %d”,r);

printf(“/n Second root of equation: %d”,r4);

}

}

Output:

Enter values of a,b,c of a quadratic equation: 2

2

4

Value of Discriminant is negative

Enter values of a,b,c of a quadratic equation: 1

5

2

First root of equation: -2.9384

Second root of equation: -7.0615

Enter values of a,b,c of a quadratic equation: 2

4

2

Roots are real

First and Second root of equation: -1