C语言二路归并排序算法

2014-11-23 17:45:40 · 作者: · 浏览: 20

  写了个二路归并的归并排序小代码,直接贴上来
  /*
  file:quick.cpp
  author:www.5dkx.com
  */
  #include
  using namespace std;
  void Merge(int a[],int low,int mid,int high,int b[]);
  void MSort(int a[],int low,int high,int b[]);
  void main()
  {
  int a[]={4,5,9,10,51,6,46,36,6,56,67,45,36};
  int b[13];
  MSort(a,0,12,b);
  for(int i=0;i<13;i++)
  cout<   cout<   for(int j=0;j<13;j++)
  cout<   cout<   }
  void Merge(int a[],int low,int mid,int high,int b[])
  {
  int i=low,j=mid+1,k=low;
  while((i<=mid)&&(j<=high))
  {
  if(a[i]<=a[j])
  {
  b[k]=a[i];
  i++;
  }
  else
  {

  b[k]=a[j];
  j++;
  }
  k++;
  }
  while(i<=mid)
  {
  a[k]=a[i];
  k++;
  i++;
  }
  while(j<=high)
  {
  a[k]=a[j];
  k++;j++;
  }
  }
  void MSort(int a[],int low,int high,int b[])
  {
  if(low==high)
  b[low]=a[low];
  else
  {
  int mid=(low+high)/2;
  MSort(a,low,mid,b);
  MSort(a,mid+1,high,b);
  Merge(a,low,mid,high,b);
  }
  }