单链表中的插入一个元素问题

Question

怎么把输入16 7 8 12 输出变为什么16 7 8 12

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

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

struct node *insert_tail(int value, struct node *head);
struct node *strings_to_list(int len, char *strings[]);
void print_list(struct node *head);

// 主程序

int main(int argc, char *argv[]) {
    int value;
    scanf("%d", &value);
    // create linked list from command line arguments
    struct node *head = NULL;
    if (argc > 1) {
        // list has elements
        head = strings_to_list(argc - 1, &argv[1]);
    }

    struct node *new_head = insert_tail(value, head);
    print_list(new_head);

    return 0;
}


// 改这个struct
struct node *insert_tail(int value, struct node *head) {
    struct node *p = malloc(sizeof (struct node));
    p->data = value;
    p->next = head;
    return p;
}

// 
//
struct node *strings_to_list(int len, char *strings[]) {
    struct node *head = NULL;
    int i = len - 1;
    while (i >= 0) {
        struct node *n = malloc(sizeof (struct node));
        assert(n != NULL);
        n->next = head;
        n->data = atoi(strings[i]);
        head = n;
        i -= 1;
    }   
    return head;
}


// 
void print_list(struct node *head) {
    printf("[");    
    struct node *n = head;
    while (n != NULL) {
        // If you're getting an error here,
        // you have returned an invalid list
        printf("%d", n->data);
        if (n->next != NULL) {
            printf(", ");
        }
        n = n->next;
    }
    printf("]\n");
}

Answer 1

你的代码 gcc 9.2 vs2019都输出正常的