一元稀疏多项式简单计算器

else { item=item1;

i++;

} try{ if(item.getC()==0)//当得到项的系数为0时就没有必要加入 continue;

temp.getLinList().insert(temp.getLinList().size(),item); }catch(Exception e){}

}

//将没有参加比较的项加进去，注意比较之后 有且只有一个有多余的项 while(i

temp.getLinList().insert(temp.getLinList().size(),item1);

}catch(Exception e){} i++;

}

while(j

temp.getLinList().insert(temp.getLinList().size(),item1); }catch(Exception e){} j++;

}

temp.getLinList().head.setElement(temp.getLinList().size());//设置项数 return temp; }

public Polynomial subtraction(Polynomial other)throws Exception{//多项式相减 int n=other.getItemNum(); if(n==0) return this;

Polynomial temp=new Polynomial(); LinList l=temp.getLinList(); for(int i=0;i

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Item item =(Item)other.getLinList().getData(i); double c=-1*item.getC();//取反 l.insert(i,new Item(c,item.getE()));

}

l.head.setElement(n);//设置项数 return add(temp);

}

public double result(double x)throws Exception{ double sum=0;

int n=getItemNum();//该多项式的项数 if(n==0) return 0; for(int i=0;i

return sum;

}

}

Test1类：

import java.io.*; import java.util.Scanner;

public class Test1 {

Scanner scanner =new Scanner(System.in);

public static void main(String[] args)throws Exception{ Test1 test1=new Test1();

Scanner scanner1 =new Scanner(System.in);

while(true){

System.out.println(\请输入你要操作的系号：\\n\ \输出多项式\\n\

\多项式相加\\n\

\多项式相减\\n\

\计算多项式在x处的值\\n\ \退出\ String s=scanner1.next();

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int t=-1; try{

t=Integer.parseInt(s); }catch(Exception e){}

switch(t){

case 1:test1.printPolynomial();break; case 2:test1.add();break; case 3:test1.subtraction();break; case 4:test1.resultOfPolynomia();break; case 5:System.exit(0);break;

default:System.out.println(\你输入的操作有误，请重试\\n\

} }

}

private void printPolynomial()throws Exception{//选择1时

System.out.println(\请输入要输出的多项式的信息：\

Item[] item=creatItemShuZu(); Polynomial p=new Polynomial(item); p.printPolynomial();

}

private void add()throws Exception{//选择2时

System.out.println(\请输入第一个多项式的信息：\

Item[] item1=creatItemShuZu(); Polynomial p1=new Polynomial(item1);

System.out.println(\请输入第二个多项式的信息：\ Item[] item2=creatItemShuZu(); Polynomial p2=new Polynomial(item2); Polynomial p=p1.add(p2); System.out.print(\ p1.print();

System.out.print(\ p2.print();

System.out.print(\ p.print(); System.out.println();

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}

private void subtraction()throws Exception{//选择3时

System.out.println(\请输入第一个多项式的信息：\

Item[] item1=creatItemShuZu(); Polynomial p1=new Polynomial(item1);

System.out.println(\请输入第二个多项式的信息：\ Item[] item2=creatItemShuZu(); Polynomial p2=new Polynomial(item2); Polynomial p=p1.subtraction(p2); System.out.print(\ p1.print();

System.out.print(\ p2.print();

System.out.print(\ p.print(); System.out.println(); }

private void resultOfPolynomia()throws Exception{//选择4时

System.out.println(\请输入要输出的多项式的信息：\

Item[] item=creatItemShuZu(); Polynomial p=new Polynomial(item); System.out.println(\请输入x=\ double x=scanner.nextDouble();

System.out.println(p.result(x)); }

private Item[] creatItemShuZu()throws Exception{//构造多项式数组 System.out.print(\项数n=\ int n=scanner.nextInt(); double []c=new double[n]; int [] e=new int[n]; Item[] item=new Item[n];

System.out.print(\请输入各项的系数：\ for(int i=0;i

c[i]=scanner.nextDouble();

System.out.print(\请输入各项的指数：\

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