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 undead Registered User Join Date: Apr 2012 Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts I need a help.

Quote:
 how to be a problem here, my code does not calculate the complex roots, the code only calculates the real roots
Code:
```//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:";
cin>>n;
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];

do

{
it = 0;
c = a;
b = a;

do
{
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];
it++;
}
while (abs( b[n]) > 1e-5 && it<100 );

cout << "The root is:" << x << endl;

n--;

for ( i = 0; i < n; i++ )
a[i] = b[i];

}
while( n >= 1 );
getch();

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.. 