//Derek McQuay 647465151 CS 235 Fall 2012 midterm 1
#include "node.h"

node::node(const int exponent, const int coefficient, const char variable, node* next) :
                    exponent(exponent), coefficient(coefficient), variable(variable), next(next) {}

node::node(const int exponent, const char variable, node* next) : //construtor for when coefficient is assumed 1
                    exponent(exponent), coefficient(1), variable(variable), next(next) {}

ostream & operator<<(ostream & os, node n) { //used to correctly print out each node
    if(n.coefficient == 0) {
        os << ""; 
    }
    else if(n.coefficient == 1 && n.exponent == 0) {
        os << n.coefficient;
    }
    else if(n.coefficient == -1 && n.exponent == 0) {
        os <<  n.coefficient;
    }
    else if(n.exponent == 0) {
        os << n.coefficient;
    }
    else if(n.coefficient == -1) {
        os << "-" <<  n.variable << " ^ " << n.exponent;
    }
    else if(n.coefficient < 0 && n.exponent == 1) {
        os << n.coefficient << n.variable;
    }
    else if(n.coefficient == 1 && n.exponent == 1) {
        os << n.variable;
    }
    else if(n.exponent == 1) {
       os << n.coefficient << " " << n.variable;
    }
    else if(n.coefficient == 1) {
        os << n.variable << " ^ " << n.exponent;
    }
    else {
        os << n.coefficient << " " <<  n.variable << " ^ " << n.exponent;
    }
    return os;
}