1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <time.h>
4 int * neworder(int len);
5
6 int main()
7 {
8 int a[7] = {45, 23, 12, 56, 4, 78, 56};
9 int i = 0;
10 int *b = neworder(7);
11
12 for(i = 0; i < 7; i++)
13 {
14 printf("%d ", a[b[i]]);
15
16 }
17 printf("\n");
18
19 free(b);//释放内存
20 system("pause");
21 return 0;
22 }
23
24 int * neworder(int len)//新的下标顺序，好繁琐，待优化
25 {
26 int temp = 0, count = 0, num = 0;
27 int i = 0;
28 int *b = NULL;
29
30 srand((unsigned)time(NULL));
31 b = (int*)malloc(sizeof(int) * len);
32
33 while(count < len)
34 {
35 temp = rand() % len;
36 if(0 == count)
37 {
38 b[0] = temp;
39 count++;
40 }
41
42 num = 0;
43 for(i = 0; i < count; i++)
44 {
45 if(b[i] == temp)
46 {
47 break;
48 }
49 else
50 {
51 num++;//记录不相等的个数
52 }
53 }
54
55 if(num == count)
56 {
57 b[count] = temp;
58 count++;
59 }
60 }
61
62 return b;
63 }
