PROGRAM FOR NEWTON RAPHSON

/* PROGRAM FOR NEWTON RAPHSON*/

#include<stdio.h>

#include<conio.h>

#include<math.h>

void main()

{

float x0,x1,e,delta,c;

int i,n,flag=0;

float f(float x);

float df(float x);

clrscr();

printf("enter the value of x0,e,delta,n:\n");

scanf("%f%f%f%d",&x0,&c,&delta,&n);

for (i=0;i<n;i++)

{

if (df(x0)<delta)

{

flag=1;

break;

}

x1=x0-(f(x0)/df(f(x0)));

if (fabs((x1-x0)/x1)<e)

{

flag=2;

break;

}

x0-x1;

}    //end for loop//

if(flag==0)

{

printf("\n solution does not converg in ittration\n");

}

else

if(flag==1)

printf("\n slop is root small.\n");

else

printf("\n root is %f",x1);

getch();

}

float f(float x)

{

return(x*x*x-x*x-1);

}

float df(float x)

{

return(3*x*x-2*x);

}

/*************OUTPUT***************

Enter the value of x0,c,delta,n:

1.5

.1

3

4

Root is 2.015119   */