求助！程序运行，输入数据后，打印操作跳过了，看不出什么问题

546290544

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct student
{
    int num;
    int score;
    struct student *next;
};
struct student *chuangjian() {
    struct student *head;
    struct student *p1, *p2;
    head = (struct student*)malloc(sizeof(struct student));
    int n;
    head->next = NULL;
    p2 = head;
    printf("input the num:");
    scanf("%d", &n);
    while(n != 0) {
        p1 = (struct student*)malloc(sizeof(struct student));
        p1->num = n;
        printf("input the score:");
        scanf("%d", &p1->score);
        printf("\n");
        p1->next = NULL;

        p1 = p1->next;
        p2 = p1;
        printf("input the num:");
        scanf("%d", &n);
    }

    return head;
}


void print(struct student *head)
{
        struct student *a;
        a=head->next;
        while(a)
        {printf("%d\t%d\n",a->num,a->score);
        a->next=a;}

}
struct student *del(struct student *head, int num) {
    struct student *p1, *p2;
    if(head = NULL) {
        printf("\nthis is null!\n");
        goto END;
    }
    p1 = head;
    while(p1->num != num && p1->next != NULL) {
        p2 = p1;
        p1 = p1->next;
    }
    if(num == p1->num) {
        p2->next = p1->next;
        printf("\nDelete num:%d succeed!\n", num);
    }
    else
    {
        printf("%d not been found!\n", num);
    }
    END:
    return head;
}
int main() {
    struct student *head=NULL;
    int n;
    head = chuangjian();
    print(head);
    printf("input the num for delete:");
    scanf("%d", &n);
    del(head, n);
    return 0;
}

AmosAlbert

我运行了你的程序后没有跳过，应该是编程环境设置的问题。你可试一下system（“pause”），记得加上头文件include<windows.h>.还有程序中尽量少使用go语句，虽然编写方便，但不利于代码的复用性，对其维护困难，可读性差。