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

int user_power,i=0,cnt=0,flag=0;
int coef[10]={0};
float x1=0,x2=0,t=0;
float fx1=0,fdx1=0;

void main()
{

    clrscr();

    printf("\n\n\t\t\t PROGRAM FOR NEWTON RAPHSON GENERAL");

    printf("\n\n\n\tENTER THE TOTAL NO. OF POWER:::: ");
    scanf("%d",&user_power);

    for(i=0;i<=user_power;i++)
    {
        printf("\n\t x^%d::",i);
        scanf("%d",&coef[i]);
    }

    printf("\n");

    printf("\n\t THE POLYNOMIAL IS ::: ");
    for(i=user_power;i>=0;i--)//printing coeff.
    {
        printf(" %dx^%d",coef[i],i);
    }

    printf("\n\tINTIAL X1---->");
    scanf("%f",&x1);

    printf("\n ******************************************************");
    printf("\n ITERATION    X1    FX1    F'X1  ");
    printf("\n **********************************************************");

    do
    {
            cnt++;
            fx1=fdx1=0;
            for(i=user_power;i>=1;i--)
            {
                fx1+=coef[i] * (pow(x1,i)) ;
            }
            fx1+=coef[0];
            for(i=user_power;i>=0;i--)
            {
                fdx1+=coef[i]* (i*pow(x1,(i-1)));
            }
            t=x2;
            x2=(x1-(fx1/fdx1));

            x1=x2;

            printf("\n %d         %.3f  %.3f  %.3f ",cnt,x2,fx1,fdx1);

    }while((fabs(t - x1))>=0.0001);
    printf("\n\t THE ROOT OF EQUATION IS %f",x2);
    getch();
}

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


            PROGRAM FOR NEWTON RAPHSON GENERAL


    ENTER THE TOTAL NO. OF POWER:::: 3

     x^0::-3

     x^1::-1

     x^2::0

     x^3::1


     THE POLYNOMIAL IS :::  1x^3 0x^2 -1x^1 -3x^0

     INTIAL X1---->3

 **************************************
 ITERATION    X1    FX1    F'X1
 **************************************
 1         2.192  21.000 26.000
 2         1.794  5.344  13.419
 3         1.681  0.980  8.656
 4         1.672  0.068  7.475
 5         1.672  0.000  7.384
 **************************************

     THE ROOT OF EQUATION IS 1.671700