#include"polynomial.h"
#include<iostream>

void AddPolyn(){
	Polynomial pa,pb,pc;
	pa.Create();pa.Print();
	pb.Create();pb.Print();
	cout<<"\n兩個多項式的和是:";
	pc.sum(pa,pb);pc.Print();
	cout<<endl;
}

void SubtractPolyn(){
	Polynomial pa,pb,pc;
	pa.Create();pa.Print();
	pb.Create();pb.Print();
	for(int j=1;j<=pb.GetExpn(0);j++) pb.SetCoef(-1*pb.GetCoef(j),j);//符號相反之后求和
	cout<<"\n兩個多項式的差是:";
	pc.sum(pa,pb);pc.Print();
	cout<<endl;	
}

void qiudao(){
	Polynomial pa;
	pa.Create();pa.Print();
	pa.differential();
	cout<<"\n求導后的";
	pa.Print();
}

void main(){
	char y;	
	cout<<"請輸入你需要的功能："<<endl;
	do{
		cout<<"\n1.多項式求和 2.多項式相減 3.多項式求導 4.結束程序:";
		cin>>y;
		switch(y){
		case '1':AddPolyn();break;
		case '2':SubtractPolyn();break;
		case '3':qiudao();break;
		}
	}while(y!='4');
}