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  1. #include<iostream>
  2. #include<time.h>
  3. using namespace std;
  4.  
  5. void sift(int [],int,int);
  6. void BuildMaxHeap(int [],int);
  7. void Heap_sort(int [],int);
  8. void Heap_sort_old(int [],int);
  9.  
  10. int main(void){
  11.  
  12.     srand(time(NULL));
  13.  
  14.  
  15.     int heap[13];
  16.  
  17.     for(int i=0;i<13;i++)
  18.        heap[i]=rand()%100;
  19.  
  20.       cout<<"Heap sort前:";
  21.       for(int i=0;i<13;i++)
  22.       cout<<heap[i]<<" "; 
  23.       cout<<endl;
  24.  
  25.     Heap_sort(heap,13);
  26.  
  27.     cout<<"Heap sort後:";
  28.     for(int i=0;i<13;i++)
  29.      cout<<heap[i]<<" "; 
  30.      cout<<endl;
  31.  
  32.     system("pause"); 
  33.      return 0;  
  34. }
  35.  
  36.  
  37. void BuildMaxHeap(int heap[],int n){
  38.         int i;
  39.         for(i=n/2-1;i>=0;i--)
  40.          sift(heap,i,n);
  41.  
  42.      }
  43.  
  44.  
  45. void sift(int a[],int head,int n){
  46.  
  47.  
  48.      int temp,j;
  49.  
  50.  
  51.  
  52.  
  53.      while(head*2+1<n){
  54.  
  55.              j=2*head+1; 
  56.  
  57.             if(head*2+1==n-1){
  58.  
  59.  
  60.             if(a[head]>a[j])
  61.              break;
  62.  
  63.  
  64.             }
  65.  
  66.             else{
  67.                  if(a[j+1]>a[j])
  68.                      j++;
  69.  
  70.             if(a[head]>a[j])
  71.              break;
  72.  
  73.  
  74.                  }
  75.  
  76.             temp=a[head];
  77.             a[head]=a[j];    
  78.             a[j]=temp;
  79.             head=j;
  80.  
  81.  
  82.      }
  83.  
  84.  
  85.      }
  86.  
  87.  
  88.  
  89.  
  90.  
  91.  
  92. void Heap_sort(int heap[],int n){
  93.      int temp;
  94.  
  95.      for(int i=(n-2)/2;i>=0;i--)
  96.          sift(heap,i,n);
  97.  
  98.  
  99.      for(int i=n-1;i>=1;i--){
  100.  
  101.       temp=heap[i];
  102.       heap[i]=heap[0];
  103.       heap[0]=temp;
  104.  
  105.       sift(heap,0,i);
  106.  
  107.       }
  108.      }
  109.  
  110.  
  111.  
  112.  
  113. void Heap_sort_old(int heap[],int n){
  114.      int temp;
  115.  
  116.      for(int i=(n-2)/2;i>=0;i--)
  117.          sift(heap,i,n);
  118.  
  119.  
  120.      while(n>1){
  121.      temp=heap[n-1];
  122.      heap[n-1]=heap[0];
  123.      heap[0]=temp;
  124.      n--;
  125.  
  126.  
  127.      for(int i=0;i<=n-1;i++)
  128.      sift(heap,0,n);
  129.  
  130.  
  131.      }
  132.  
  133.  
  134.      }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:12: error: ‘srand’ was not declared in this scope
prog.cpp:18: error: ‘rand’ was not declared in this scope
prog.cpp:32: error: ‘system’ was not declared in this scope
stdout
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Standard output is empty
https://ideone.com/qAjAY
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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