经典算法_结构体

1 动态结构体

 1 #define _CRT_SECURE_NO_WARNINGS
 2
 3 #include<stdio.h>
 4 #include<stdlib.h>
 5
 6 struct dangdang
 7 {
 8     char email[30];
 9     char name[30];
10     char addr[100];
11     int num;
12     int bignum;
13     char tel[20];
14     char phone[20];
15     double rmb;
16 };
17
18 main()
19 {
20     struct dangdang *p = (struct dangdang *)malloc(sizeof(struct dangdang) * 10);
21     int i;
22     struct dangdang *px;
23
24     for (i = 0;i < 10;i++)//下标循环
25     {
26         sprintf(p[i].email, "[email protected]");
27         p[i].num = 100;
28         printf("%s,%d\n", p[i].email, p[i].num);
29     }
30
31     for (px = p;px < p + 10;px++)//指针循环px->email
32     {
33         sprintf(px->email, "[email protected]");
34         px->num = 100;
35         printf("%s,%d\n", px->email, px->num);
36     }
37
38     for (i = 0;i < 10;i++)//指针循环(*(p + i)).email
39     {
40         sprintf((*(p + i)).email, "[email protected]");
41         (*(p + i)).num = 100;
42         printf("%s,%d\n", (*(p + i)).email, (*(p + i)).num);
43     }
44
45     system("pause");
46 };