C语言 建立链表并删除指定年龄的结点

建立一个链表,每个结点包括:学号、姓名、性别、年龄。输入一个年龄,如果链表中的结点所包含的年龄等于此年龄,则将此结点删去。

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

typedef struct Node {
    long num;
    char name[20];
    char gender[10];
    int age;
    struct Node* next;
} Node;

Node* creat() {
    Node *head = NULL, *p1, *p2;
    p1 = p2 = (Node*)malloc(sizeof(Node));
    scanf("%ld %s %s %d", &p1->num, p1->name, p1->gender, &p1->age);
    int n = 0;

    while (p1->num != 0) {
        n++;
        if (n == 1) head = p1;
        else p2->next = p1;
        p2 = p1;
        p1 = (Node*)malloc(sizeof(Node));
        scanf("%ld %s %s %d", &p1->num, p1->name, p1->gender, &p1->age);
    }
    p2->next = NULL;
    return head;
}

void print(Node* head) {
    Node* p = head;
    while (p != NULL) {
        printf("Num: %ld, Name: %s, Gender: %s, Age: %d\n", p->num, p->name, p->gender, p->age);
        p = p->