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如何在不進入非終止 while 循環的情況下顯示鏈表的元素?

[英]How do you display elements of the linked list, without going into a non terminating while loop?

我正在編寫一個 C 代碼,用於使用 while 循環實現和遍歷鏈接列表。 我無法弄清楚我在代碼中寫錯了什么。 代碼不是在 while (a,=NULL) 中終止並顯示鏈表中的所有元素。它進入了無限循環。 這是代碼......

    #include<stdio.h>
    #include<stdlib.h>
    struct node{
        int data;
        struct node * next;
     };
     
     void Display(struct node * a){
         printf("The elements are :");
         while(a!=NULL){
             printf("%d\n",a->data);
             a=a->next;
         }
    
     }
     int main(){
         int choice;
         struct node * head, * new_node,  * temp;
         head = NULL;  // head points to NULL
                            
         new_node=(struct node*)malloc(sizeof(struct node));
         while(choice){
             
             printf("Enter the Data");
             scanf("%d", &new_node->data); // Entering value in new_node
             new_node->next=NULL;
             if (head == NULL)
             {
    
                 head = temp = new_node;
    
             }
             else
             {
                 temp->next = new_node;
                 temp = new_node; 
             }
             printf("Enter 0 for ending and 1 for continuing");
             scanf("%d", &choice);
         }
         Display(head);
         return 0;
     }

Output:輸入數據1輸入0結束,1繼續 1輸入數據2輸入0結束,1繼續1輸入數據3輸入0結束,1繼續0 3

3

3

3

3

3

3

......沒有終止

#include<stdio.h>
    #include<stdlib.h>
    struct node{
        int data;
        struct node * next;
     };
     
     void Display(struct node * a){
         printf("The elements are :");
         while(a!=NULL){
             printf("%d\n",a->data);
             a=a->next;
         }
    
     }
     int main(){
         int choice;
         struct node * head, * temp;
         head = NULL;  // head points to NULL
                            
         
         while(choice){
             struct node *new_node=(struct node*)malloc(sizeof(struct node));
             printf("Enter the Data");
             scanf("%d", &new_node->data); // Entering value in new_node
             new_node->next=NULL;
             if (head == NULL)
             {
    
                 head = temp = new_node;
    
             }
             else
             {
                 temp->next = new_node;
                 temp = new_node; 
             }
             printf("Enter 0 for ending and 1 for continuing");
             scanf("%d", &choice);
         }
         Display(head);
         return 0;
     }

根據Eugene Sh ,此代碼將起作用

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