我在c中创建了一个链表来对文本文件中的单词进行排序。插入函数是在阅读一行单词和含义由：分隔的行后添加一个节点。该文件只是一个单词：含义格式的字典行。当我运行代码时，它没有打印任何内容，也没有错误消息

type here
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

struct node 
{
    char word[30];
    char meaning[50];
    struct node *next;//링크
};

void insert(struct node **head, char *word, char *meaning) 
{
    struct node *new_node = (struct node*) malloc(sizeof(struct node));
    strcpy(new_node->word, word);
    strcpy(new_node->meaning, meaning);
    new_node->next = NULL;

    if (*head == NULL) //빈 리스트
    {
        *head = new_node;
    } 
    else if (strcasecmp((*head)->word, word) > 0) //첫위치 삽입
    {
        new_node->next = *head;
        *head = new_node;
    } 
    else //보통
    {
        struct node *curr = *head;
        while (strcmp(curr->next->word, word) < 0) 
        {
            curr = curr->next; //탐색위치 head에서 시작, 계속 1칸씩 옮겨가며 찾기
            if(curr->next==NULL) break; //if the next node is null, break, insert new_node at the end
        }
        //순서 제대로 찾으면 그 위치에 연결
        new_node->next = curr->next;
        curr->next = new_node;
    }
}

void print_list(struct node * head) 
{
    struct node * cur=head;
    while (cur->next!= NULL) 
    {
        printf("%s : %s\n", cur->word, cur->meaning);
        if(cur->next==NULL){
            return;
        }
        cur = cur->next;
    }
}

int main() 
{
    FILE *fp;
    char line[150];

    fp = fopen("randdict.txt", "r");

    if (fp == NULL) 
    {
        printf("Unable to open file.\n");
        exit(1);
    }

    struct node *head = NULL;

    while (fgets(line, 150, fp)) 
    {
        char *new_word = strtok(line, ":");
        char *new_meaning = strtok(NULL, ":");
        insert(&head, new_word, new_meaning);//알파벳순으로 입력

    }

    fclose(fp);

    print_list(head);

    return 0;
}

我尝试通过获取if return语句来修改print_list函数，即使在while循环中已经有了一个条件，可以帮助我跳出循环。