term.h

用Ｃ＋＋实现多项式处理

//#ifndef term
//#define term
#include"assert.h"
class Term{
public:
	Term(int c,int p);
	Term(const Term &);
	Term & operator=(const Term &right);
	Term operator*(const Term &right);
	Term operator+(const Term &right);
	int operator ==(const Term &r);
	double evalAt(double x);
private:
	int coefficient;
	int power;
	friend class Polynomial;
	friend ostream & operator<<(ostream &,const Term &);
};
Term::Term(int c,int p):power(p){
	coefficient=c;
}
Term::Term(const Term & x):coefficient(x.coefficient),power(x.power){
}
Term & Term::operator=(const Term & right){
	coefficient=right.coefficient;
	power=right.power;
	return *this;
}
Term Term::operator*(const Term & right){
	return Term(coefficient *right.coefficient,power+right.power);
}
Term Term::operator+(const Term &right){
	assert(power==right.power);
	return Term(coefficient+right.coefficient,power);
}
int Term::operator==(const Term &r){
	return (coefficient==r.coefficient)&&(power==r.power);
}
ostream & operator<<(ostream & out,const Term & val){
	if(val.coefficient==0)
		return out;
	out<<val.coefficient;
	switch(val.power){
	case 0:
			break;
	case 1:
			cout<<"x";
			break;
	default:
		out<<"x^"<<val.power;
		break;
	}
	return out;
}
//#endif