1 #include<stdio.h>
2 #include<malloc.h>
3 void shift_down(int a[], int low, int high)
4 {
5 int i = low, j = i*2;
6 int tmp = a[i];
7 while(j <= high){
8 if(j < high && a[j] < a[j+1])
9 j++;
10 if(tmp < a[j]){
11 a[i] = a[j];
12 i = j;
13 j = i*2;
14 }
15 else break;
16 }
17 a[i] = tmp;
18 }
19 void shift_up(int a[], int low, int high)
20 {
21 int i = high/2, j = high;
22 int tmp = a[high];
23 while(i >= 1){
24 if(a[i] < tmp){
25 a[j] = a[i];
26 j = i;
27 i = j/2;
28 }
29 else break;
30 }
31 a[j] = tmp;
32 }
33 void print(int a[], int n)
34 {
35 int i;
36 for(i = 1; i <= n; i++){
37 printf("%d ", a[i]);
38 }
39 printf("
");
40 }
41 int main()
42 {
43 int n, i, a[110];
44 scanf("%d", &n);
45 for(i = 1; i <= n; i++){
46 scanf("%d", &a[i]);
47 }
48 for(i = n/2; i >= 1; i--){
49 shift_down(a, i, n);
50 } //建立大顶堆
51 print(a, n);
52
53 printf("删除大顶堆顶：");
54 a[1] = a[n];//删除当前最大元素
55 n--;
56 shift_down(a, 1, n);
57 print(a, n);
58
59 printf("插入一个值：");
60 n++;
61 scanf("%d", &a[n]);
62 shift_up(a, 1, n);
63 print(a, n);
64 return 0;
65 }
66 /*10
67 6 8 7 9 0 1 3 2 4 5*/
