链表多项式为什么我的输出只打印第一个项。

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英文:

Linkedlist polynomial why my output only print first term

问题

我刚刚编写了一个程序,用于添加两个多项式链接列表。我的输出只打印出多项式的第一个项。

我无法弄清楚有什么错误。我想在这里得到一些帮助。有人可以告诉我代码有什么问题吗?

public void addNode(int cof, int exp) {
    PNode node = new PNode(cof, exp);
    if (first == null) {
        first = last = node;
        return;
    }
    last.next = node;
    last = node;
}

public PolynomialLinkedList add(PolynomialLinkedList s) {
    PolynomialLinkedList sum = new PolynomialLinkedList();

    // 实现这个方法
    PNode list1 = first;
    PNode list2 = s.first;
    while (list1 != null && list2 != null) {
        if (list1.exp == list2.exp) {
            sum.addNode(list1.coe + list2.coe, list1.exp);
            list1 = list1.next;
            list2 = list2.next;
        } else if (list1.exp > list2.exp) {
            sum.addNode(list1.coe, list1.exp);
            list1 = list1.next;
        } else if (list2.exp > list1.exp) {
            sum.addNode(list2.coe, list2.exp);
            list2 = list2.next;
        }
    }
    return sum;
}

(注意:此处只提供翻译后的代码,不包含额外内容。)

英文:

I just wrote a program that add two polynomial linked-list. my output only prints first term of the polynomials.

I cannot figure out what bug is. I want to get some help here. could someone tell what's wrong with my code.

public void addNode(int cof, int exp) {
    PNode node = new PNode(cof, exp);
    if (first == null) {
        first = last = node;
        return;
    }
    last.next = node;
    last = node;
}
public PolynomialLinkedList add(PolynomialLinkedList s) {
    PolynomialLinkedList sum = new PolynomialLinkedList();

    //implement this method
    PNode list1 = first;
    PNode list2 = s.first;
    while (list1 != null && list2 != null) {
        if (list1.exp == list2.exp) {
            sum.addNode(list1.coe + list2.coe, list1.exp);
            list1 = list1.next;
            list2 = list2.next;
        } else if (list1.exp > list2.exp) {
            sum.addNode(list1.coe, list1.exp);
            list1 = list1.next;
        } else if (list2.exp > list1.exp) {
            sum.addNode(list2.coe, list2.exp);
            list2 = list2.next;
        }
    }
    return sum;
}

答案1

得分: 2

如果其中一个列表先结束,其他列表中的剩余项目将被忽略,不会被添加到总和中。

添加额外的循环

while(list1 != null) {
 sum.addNode(list1.coe, list1.exp);
            list1 = list1.next;
}

while(list2 != null) {
 sum.addNode(list2.coe, list2.exp);
            list2 = list2.next;
}
英文:

If one of the lists finishes first, the rest of the items in other list are ignored and are not getting added to the sum.

Add additional loops

while(list1 != null) {
 sum.addNode(list1.coe,list1.exp);
            list1=list1.next;
}

and

while(list2 != null) {
 sum.addNode(list2.coe,list2.exp);
            list2=list2.next;
}

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  • 本文由 发表于 2020年9月15日 02:44:24
  • 转载请务必保留本文链接:https://go.coder-hub.com/63890165.html
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