Fixed Point Method / C++ Programming

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Fixed Point Method / C++ Programming

#include<iostream>
#include<math.h>
using namespace std;

#define f(x) x*x-6*x+8 // equation 
#define g(x) (x*x+8)/6

int main()
{
    float x0,x1,e=1;
    cout<< "input the initial guess:";
    cin>>x0;
    while(e>0.005)
    {
        x1=g(x0);//working formula 
        e=fabs((x1-x0)/x1);
        x0=x1;
    }
    cout<< "nthe root of the equation ="<<x0;
    return 0;
}

Output :

input the initial guess :1
the root of the equation is :1.98596

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