#include<stdio.h>
#include<conio.h>
#include<math.h>
#define ESP 0.00001
#define F1(x) (x)*(x)*(x) - 5*(x) + 3
#define F2(x) 3*(x)*(x) - 5
void main()
{
  float x1,x2,f1,f2;
  clrscr();
  do
  {
  printf("\nEnter the value of x1: ");
  scanf("%f",&x1);
  }while(F1(x1) > 0);
  printf("\n______________________________________________\n");
  printf("\n    x1\t       f(x)\t f'(x)\t   x2");
  printf("\n______________________________________________\n");
  do
  {
  f1=F1(x1);
  f2=F2(x1);
  x2=x1-(f1/f2);
  printf("\n%f   %f   %f   %f ",x1,f1,f2,x2);
  x1=x2;
  getch();
  }while(F1(x2)>ESP);
printf("\n______________________________________________\n");
printf("\n\nApp.root = %f",x2);
getch();
}

/*
 OUT PUT
---------

Enter the value of x1: 1

______________________________________________

    x1        f(x)       f'(x)       x2
______________________________________________

1.000000   -1.000000   -2.000000   0.500000
0.500000    0.625000   -4.250000   0.647059
0.647059    0.035620   -3.743945   0.656573
0.656573    0.000176   -3.706736   0.656620
______________________________________________


App.root = 0.656620

*/