Question

我是编程的新手，所以我坚持使用这段代码。我正在尝试实现链表并应用评论中提到的功能。当我调试程序时，它没有显示错误，但是当我运行代码时它说“控制台应用程序停止工作......” 我不知道这里有什么问题。为什么不起作用？

#include<iostream>
#include<conio.h>
using namespace std;

/*• InsertNodeAtFront()
•   InsertNodeAtBack()
•   PrintList()
*/

class list {
 struct node {
    int data;
    node* next;
}; 
node *head; 
node *current;
public:
    list() {
        head = NULL;
        current = NULL;
    }

    void InsrtAtFront(int n) {
        node *temp = new node;
        temp->data = n;
        temp->next = NULL;
        if (head == NULL) {
            temp = head;
        }
        else {
            temp->next = head;
            head = temp;
        }
}
    void InsrtAtBack(int a) {
        node *temp1 = new node;
        temp1->data = a;
        temp1->next = NULL;
        if (head == NULL) {
            temp1 = head;
        }
        else {
            current = head;
            while (current->next!=NULL){
                current = current->next;
            }
            current = temp1;
        }
    }
    void print() {
        current = head;
        while (current->next != NULL) {
            cout << current->data;
            current = current->next;
        }
    }
};

void main() {
    list obj1, obj2, obj3;
    obj3.print();
    obj1.InsrtAtFront(5);
    obj1.InsrtAtFront(7);
    obj1.InsrtAtFront(9);
    obj3.print();
    obj2.InsrtAtBack(2);
    obj2.InsrtAtBack(4);
    obj2.InsrtAtBack(6);
    obj3.print();
}

Answer 1

list() {
    head = NULL;
    current = NULL;
} 
void print() {
    current = head;
    while (current->next != NULL) {
        cout << current->data;
        current = current->next;
    }
}
//in main
list obj1, obj2, obj3;
obj3.print();

因此。你使用NULL引入头部，然后尝试使用当前头部的那个，并且它是null ..

我的代码出了什么问题？输出未显示

1 个答案: