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

1. #include<stdio.h>
   
2. #include<stdlib.h>
   
3. #include<string.h>
   
4. struct student
   
5. {
   
6.     int num;
   
7.     int score;
   
8.     struct student *next;
   
9. };
   
10. struct student *chuangjian() {
    
11.     struct student *head;
    
12.     struct student *p1, *p2;
    
13.     head = (struct student*)malloc(sizeof(struct student));
    
14.     int n;
    
15.     head->next = NULL;
    
16.     p2 = head;
    
17.     printf("input the num:");
    
18.     scanf("%d", &n);
    
19.     while(n != 0) {
    
20.         p1 = (struct student*)malloc(sizeof(struct student));
    
21.         p1->num = n;
    
22.         printf("input the score:");
    
23.         scanf("%d", &p1->score);
    
24.         printf("\n");
    
25.         p1->next = NULL;
    
26. 
    
27.         p1 = p1->next;
    
28.         p2 = p1;
    
29.         printf("input the num:");
    
30.         scanf("%d", &n);
    
31.     }
    
32. 
    
33.     return head;
    
34. }
    
35. 
    
36. 
    
37. void print(struct student *head)
    
38. {
    
39.         struct student *a;
    
40.         a=head->next;
    
41.         while(a)
    
42.         {printf("%d\t%d\n",a->num,a->score);
    
43.         a->next=a;}
    
44. 
    
45. }
    
46. struct student *del(struct student *head, int num) {
    
47.     struct student *p1, *p2;
    
48.     if(head = NULL) {
    
49.         printf("\nthis is null!\n");
    
50.         goto END;
    
51.     }
    
52.     p1 = head;
    
53.     while(p1->num != num && p1->next != NULL) {
    
54.         p2 = p1;
    
55.         p1 = p1->next;
    
56.     }
    
57.     if(num == p1->num) {
    
58.         p2->next = p1->next;
    
59.         printf("\nDelete num:%d succeed!\n", num);
    
60.     }
    
61.     else
    
62.     {
    
63.         printf("%d not been found!\n", num);
    
64.     }
    
65.     END:
    
66.     return head;
    
67. }
    
68. int main() {
    
69.     struct student *head=NULL;
    
70.     int n;
    
71.     head = chuangjian();
    
72.     print(head);
    
73.     printf("input the num for delete:");
    
74.     scanf("%d", &n);
    
75.     del(head, n);
    
76.     return 0;
    
77. }

复制代码

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。