c_cpp 从已排序的链接列表中删除重复项

Posted 2021-05-14

// https://www.geeksforgeeks.org/remove-duplicates-from-a-sorted-linked-list/
#include <bits/stdc++.h>
using namespace std;

struct linked_list {
    int data;
    struct linked_list* next;
};
typedef struct linked_list node;

void print (node* n) {
    while (n) {
        cout<< n->data << "->";
        n = n->next;
    }
}

node* insert(node* head, int n) {
    node* list = (node*)malloc(sizeof(node*));
    list->data = n;
    list->next = head;
    head = list;
    return head;
}

node* remove(node* head) {
    node* temp = head, *next;
    while (temp->next) {
        if (temp->data == temp->next->data){
            next = temp->next->next;
            free(temp->next);
            temp->next = next;
        }
        else
            temp = temp->next;
    }
}

int main() {
    int n;
    node* head = NULL;
    while (true) {
        cout<< "Enter the elements, and -999 to stop: ";
        cin>>n;
        if (n==-9)
            break;
        else
            head = insert(head,n);
    }
    print(head);
    remove(head);
    cout<< "\n";
    print(head);
}