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Old April 17th, 2012, 09:33 AM
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Default I need a help.

how to be a problem here, my code does not calculate the complex roots, the code only calculates the real roots
//horner's polynomial soln, synthetic division
#include <iostream>
#include <conio.h>
#include <stdio.h>
#include <math.h>
using namespace std;
int main()
	int it, n, i;
	double *a,*b,*c,x=-1000;
    cout<<"Enter the degree of the polynomial:";
	a=new double [n];
	b=new double [n];
	c=new double [n];
    cout<<"Enter the coefficients of the polynomial"<<endl;
    for ( i = 0; i < n; i++ )
        cin >> a[i];
        it = 0;
        c[0] = a[0];
        b[0] = a[0];
            for ( i = 1; i < n; i++ )
                b[i] = a[i] + x*b[i-1];

            for ( i = 1; i < n; i++ )
                c[i] = b[i] + x*c[i-1];

            x = x - b[n]/c[n-1];
		while (abs( b[n]) > 1e-5 && it<100 );
		cout << "The root is:" << x << endl;

        for ( i = 0; i < n; i++ )
            a[i] = b[i];
	while( n >= 1 );
	return 0;

my code can't calculated a complex root, imaginare numbers. i don't know how can i used this library #include <complex.h>

Last edited by undead; April 17th, 2012 at 10:36 AM..

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