newton raphson

#include<iostream.h>
#include<math.h>
#define EPS 0.000001
#define F(x) (x)*(x)*(x)*(x)-11*(x)+8
#define FD(x) 4*(x)*(x)*(x)-11

int main()
{

int count;
float x0,xn,fx,fdx,fxn,it;
cout<<"     NEWTON RAPHSON METHOD";
cout<<endl<<"x^4-11x+8";
cout<<endl<<"ENTER THE INITIAL VALUE OF X:";
cin>>x0;
cout<<"....................*..........................."<<endl;
cout<<endl<<"ENTER THE NUMBER FOR ITERATION:";
cin>>it;
cout<<"....................*..........................."<<endl;
count = 1;
begin;

fx = F(x0);
fdx = FD(x0);
xn = x0-fx/fdx;

if(fabs(xn-x0)<EPS)
{

    cout<<"APPROXIMATE ROOT"<<xn<<endl;
    fxn = F(xn);
    cout<<"....................*..........................."<<endl;
    cout<<"FUNCTIONAL VALUE:"<<fxn<<endl;
    cout<<"....................*..........................."<<endl;
    cout<<"NO.OF ITERATIONS:"<<count<<endl;
    cout<<"....................*..........................."<<endl;

}

else

{
    x0 = xn;
    count = count+1;
    if(count>it)
    {
        goto begin;

    }
    else
    {
        cout<<"SOLUTION DOES CONVERGE!!"<<endl;

        cout<<"ITERATIONS:"<<it<<endl;

    }
}

}