网上有用单链表来实现多项式的加减乘，你可以参考一下，代码如下
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public class Polynomial {
private Monomial first; // 首项
//添加单项式
public void append(Monomial monomial) {
if (monomial == null) {
// do nothing
} else if (first == null) {
first = monomial;
} else {
Monomial current = first;
while (current != null) {
// Examda提示:如果指数相同，则相加
if (current.index == monomial.index) {
current.coefficient += monomial.coefficient;
break;
} else if (current.next == null) { // 否则直接扔到最后
current.next = monomial;
break;
}
current = current.next;
}
}
}
public void append(double c, int i) {
append(new Monomial(c, i));
}
public String toString() {
StringBuffer sb = new StringBuffer();
Monomial current = first;
while (current.next != null) {
sb
.append("(" + current.coefficient + "x^" + current.index
+ ") + ");
current = current.next;
}
sb.append("(" + current.coefficient + "x^" + current.index + ")");
return sb.toString();
}
// 两个多项式相加
public Polynomial add(Polynomial p2) {
Polynomial result = new Polynomial();
Monomial current = this.first;
while (current != null) {
result.append(current.coefficient, current.index); // Examda提示:注意这里
current = current.next;
}
current = p2.first;
while (current != null) {
result.append(current.coefficient, current.index);
current = current.next;
}
return result;
}
// 两个多项式相减 this- p2
public Polynomial substract(Polynomial p2) {
Polynomial result = new Polynomial();
Monomial current = this.first;
while (current != null) {
result.append(current.coefficient, current.index); // 注意这里
current = current.next;
}
current = p2.first;
while (current != null) {
result.append(-current.coefficient, current.index);
current = current.next;
}
return result;
}
/**
* this * p2
*
* @return
*/
public Polynomial multiply(Polynomial p2) {
Polynomial result = new Polynomial();
Monomial c1 = this.first;
Monomial c2 = p2.first;
while (c1 != null) {
while (c2 != null) {
result.append(c1.coefficient * c2.coefficient, c1.index
+ c2.index);
c2 = c2.next;
}
c1 = c1.next;
c2 = p2.first;
}
return result;
}
public Polynomial divide(Polynomial p2) {
// todo 实现相除
return null;
}
public static void main(String[] args) {
Polynomial p1 = new Polynomial();
p1.append(2.2, 1);
p1.append(3.3, 2);
p1.append(4.111, 7);
System.out.println("p1: " + p1);
Polynomial p2 = new Polynomial();
p2.append(2.232, 5);
p2.append(3.444, 6);
p2.append(5.777, 1);
System.out.println("p2: " + p2);
Polynomial result = p1.add(p2);
System.out.println("加: " + result);
result = p1.substract(p2);
System.out.println("减: " + result);
result = p1.multiply(p2);
System.out.println("乘: " + result);
}
}
/**
* 单项式
*/
class Monomial {
double coefficient; // 系数
int index; // 指数
Monomial next; // 后继结点
public Monomial() {
}
public Monomial(double c, int i) {
this.coefficient = c;
this.index = i;
}
}
import java.util.Scanner;
public class P {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
P prm=new P();
int a,b;
System.out.println("请输入两个整数（以空格分隔）：");
a=sc.nextInt();
b=sc.nextInt();
System.out.println("两数相加后等于："+prm.add(a,b));
System.out.println("两数相减后等于："+prm.sub(a,b));
System.out.println("两数相除后等于："+prm.divide(b,a));
sc.close();
}
int add(int a,int b) {
return a+b;
}
int sub(int a,int b) {
if(ab)
return a-b;
else
return b-a;
}
int divide(int a,int b) {
if(0==b)
System.out.println("错误");
if(0==a)
System.out.println("除数不能为0");
return b/a;
}
}
import java.util.Scanner;
public class HelloJava {
public static void main(String[] args) {
int num1 = 0;
int num2 = 0;
Scanner scanner = new Scanner(System.in);
try {
System.out.println("请输入除数 按回车确认");
num1 = scanner.nextInt();
System.out.println("请输入被除数 按回车确认");
num2 = scanner.nextInt();
}catch (InputMismatchException e){
System.out.println("输入的类型不合法");
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
if(num2 == 0) {
System.out.println("num2 的值 不能是 0");
} else {
System.out.println(num1 + " / " + num2 + " = " + (num1 / num2));
}
}
}
利用百Java应用程序编写要求输入两个整度数并计算两个数据之和具知体操作步骤道如下：内
import java.util.Scanner
public class Test {
public static void main(String[] args) {
System.out.print("请输容入第一个整数：")
Scanner s=new Scanner(System.in)
int a=s.nextInt()
System.out.print("请输入第二个整数：")
int b=s.nextInt()
System.out.println(a+b)
}
}
