首页 > 代码库 > 下午闲来没事儿，把几种常见的排序都码了一遍
下午闲来没事儿，把几种常见的排序都码了一遍
- Source code
/*
内部排序相关代码总结
*/
#include<windows.h>
#include<vector>
#include<algorithm>
#include<iostream>
#include<fstream>
#include<math.h>
#include<time.h>
#define N 10000 //待排序的数据规模
static unsigned int T = 17;
using namespace std;
void SetData(int num)
{
ofstream write;
write.open("待排序的测试数据.txt");
if (!write){
cout << "error" << endl;
exit(1);
}
for (int i = 1; i <= num; ++i)
{
srand((int)time(0) * ((T += 7)));
write << rand() % 100007;
if (i < num){
write << endl;
}
}
write.close();
}
void GetData(vector<int>& data)
{
ifstream read;
read.open("待排序的测试数据.txt");
if (!read){
cout << "error" << endl;
exit(1);
}
while (!read.eof())
{
int tem;
read >> tem;
data.push_back(tem);
}
read.close();
}
void SetOrderData(vector<int> data)
{
ofstream write;
write.open("排序后数据.txt");
for (unsigned int i = 0; i < data.size(); ++i)
{
write << data[i] << endl;
}
write.close();
}
/*
直接插入排序
*/
void StraightInsertSort(vector<int>& data)
{
int tem = 0; //代替 0 单元的作用
if (data.size() <= 1){
}
else{
for (unsigned int i = 1; i < data.size(); ++i)
{
if (data[i] < data[i - 1]){
tem = data[i];
data[i] = data[i - 1]; //记录后移
int j; //第一趟插入 j 会等于 -1
for (j = i - 1; (j >= 0) && (tem < data[j]); --j){
data[j + 1] = data[j];//记录后移
}
data[j + 1] = tem;//插入正确位置
}
}
}
}
/*
折半插入排序
*/
void BinaryStraightInsertSort(vector<int>& data)
{
int tem = 0;
if (data.size() <= 1){
}
else{
for (int i = 1; i < data.size(); ++i)
{
tem = data[i];
int low = 0, high = i - 1;
while (low <= high)
{
int mid = (low + high) / 2;
if (tem < data[mid]){
high = mid - 1;//插入点在低半区
}
else{
low = mid + 1;//插入点在高半区
}
}
int j = i - 1;
for (j = i - 1; j >= high + 1; --j){
data[j + 1] = data[j];//记录后移
}
data[high + 1] = tem; //插入点
}
}
}
/*
2-路折半插入排序
*/
void TwoRoadInsertSort(vector<int>& data)
{
if (data.size() <= 1){
}
else{
int midNum = data[0];
vector<int> highStack, lowStack;
for (vector<int>::size_type i = 1; i < data.size(); ++i)
{
if (data[i] < midNum){
int low = 0, high = lowStack.size() - 1;
while (low <= high)
{
int mid = (low + high) / 2;
if (lowStack[mid] < data[i]){
low = mid + 1; //插入点在高半区
}
else{
high = mid - 1;//插入点在低半区
}
}
lowStack.push_back(0);
for (int j = lowStack.size() - 2; j >= high + 1; --j)
{
lowStack[j+1] = lowStack[j];//记录后移
}
lowStack[high + 1] = data[i];//准确插入
}
else{
int low = 0, high = highStack.size() - 1;
while (low <= high)
{
int mid = (high + low) / 2;
if (highStack[mid] < data[i]){
low = mid + 1;
}
else{
high = mid - 1;
}
}
highStack.push_back(0);
for (int j = highStack.size() - 2; j >= high + 1; --j)
{
highStack[j+1] = highStack[j];
}
highStack[high + 1] = data[i];
}
}
data.clear();
for (vector<int>::size_type j = 0; j < lowStack.size(); ++j)
{
data.push_back(lowStack[j]);
}
data.push_back(midNum);
for (vector<int>::size_type j = 0; j < highStack.size(); ++j)
{
data.push_back(highStack[j]);
}
}
}
/*
快速排序
*/
int PartOfQuickSort(vector<int>& data,int low,int high)
{
int key = data[low];
while (low < high)
{
while ((low < high) && (data[high] >= key)){
--high;
}
data[low] = data[high];
while ((low < high) && (data[low] <= key)){
++low;
}
data[high] = data[low];
}
data[low] = key;
return low;
}
void QSort(vector<int>& data,int low,int high)
{
if (low < high)
{
int pivotloc = PartOfQuickSort(data, low, high);
QSort(data, low, pivotloc - 1);
QSort(data, pivotloc + 1, high);
}
}
void QuickSort(vector<int>& data)
{
QSort(data, 0, data.size() - 1);
}
/*
堆排序
*/
inline void Swap(int& a, int& b)
{
a ^= b;
b ^= a;
a ^= b;
}
void HeapAdjust(vector<int>& data, int top, int tail)
{
int key = data[top];
for (int i = 2 * top + 1; i <= tail; i = i * 2 + 1)
{
i = ((i < tail) && (data[i] < data[i + 1])) ? (i + 1) : i;
if (key>data[i]){
break;
}
data[top] = data[i];
top = i;
}
data[top] = key;
}
void HeapSort(vector<int>& data)
{
for (int i = data.size() / 2 - 1; i >= 0; --i)
{
HeapAdjust(data, i, data.size()-1);
}
for (int i = data.size() - 1; i >= 0; --i)
{
Swap(data[0], data[i]);
HeapAdjust(data, 0, i - 1);
}
}
/*
归并排序
*/
void Merge(vector<int>& data, int low, int mid, int high)
{
int s = low, t = mid + 1;
vector<int> temp;
while ((s <= mid) && (t <= high))
{
if (data[s] < data[t]){
temp.push_back(data[s]);
++s;
}
else{
temp.push_back(data[t]);
++t;
}
}
if (s == mid + 1){
for (int j=t ; j <= high; ++j){
temp.push_back(data[t++]);
}
}
else{
for (int j=s ; j <= mid; ++j){
temp.push_back(data[s++]);
}
}
for (int j=0; j < temp.size(); ++j)
{
data[low++] = temp[j];
}
}
void Merge_S(vector<int>& data, int low, int high)
{
if (low < high){
int mid = (low + high) / 2;
Merge_S(data, low, mid);
Merge_S(data, mid + 1, high);
Merge(data, low, mid, high);
}
}
void MergeSort(vector<int>& data)
{
Merge_S(data, 0, data.size() - 1);
}
void test_StraightInsertSort()
{
cout << "StraightInsertSort " << N << " rand numbers ." << endl;
SetData(N);
vector<int> data;
GetData(data);
DWORD64 start = GetTickCount();
StraightInsertSort(data);
DWORD64 end = GetTickCount();
cout << "The run time is " << (end - start) << " ms ." << endl;
SetOrderData(data);
}
void test_BinaryStraightInsertSort()
{
cout << "BinaryStraightInsertSort " << N << " rand numbers ." << endl;
SetData(N);
vector<int> data;
GetData(data);
DWORD64 start = GetTickCount();
BinaryStraightInsertSort(data);
DWORD64 end = GetTickCount();
cout << "The run time is " << (end - start) << " ms ." << endl;
SetOrderData(data);
}
void test_TwoRoadInsertSort()
{
cout << "TwoRoadInsertSort " << N << " rand numbers ." << endl;
SetData(N);
vector<int> data;
GetData(data);
DWORD64 start = GetTickCount();
TwoRoadInsertSort(data);
DWORD64 end = GetTickCount();
cout << "The run time is " << (end - start) << " ms ." << endl;
SetOrderData(data);
}
void test_QuickSort()
{
cout << "QuickSort " << N << " rand numbers ." << endl;
SetData(N);
vector<int> data;
GetData(data);
DWORD64 start = GetTickCount();
QuickSort(data);
DWORD64 end = GetTickCount();
cout << "The run time is " << (end - start) << " ms ." << endl;
SetOrderData(data);
}
void test_STL_QuickSort()
{
cout << "STL_QuickSort " << N << " rand numbers ." << endl;
SetData(N);
vector<int> data;
GetData(data);
DWORD64 start = GetTickCount();
sort(data.begin(), data.end());
DWORD64 end = GetTickCount();
cout << "The run time is " << (end - start) << " ms ." << endl;
SetOrderData(data);
}
void test_HeapSort()
{
cout << "HeapSort " << N << " rand numbers ." << endl;
SetData(N);
vector<int> data;
GetData(data);
DWORD64 start = GetTickCount();
HeapSort(data);
DWORD64 end = GetTickCount();
cout << "The run time is " << (end - start) << " ms ." << endl;
SetOrderData(data);
}
void test_MergeSort()
{
cout << "MergeSort " << N << " rand numbers ." << endl;
SetData(N);
vector<int> data;
GetData(data);
DWORD64 start = GetTickCount();
MergeSort(data);
DWORD64 end = GetTickCount();
cout << "The run time is " << (end - start) << " ms ." << endl;
SetOrderData(data);
}
int main()
{
test_StraightInsertSort();
cout << "------------------------------------" << endl;
test_BinaryStraightInsertSort();
cout << "------------------------------------" << endl;
test_TwoRoadInsertSort();
cout << "------------------------------------" << endl;
test_QuickSort();
cout << "------------------------------------" << endl;
test_STL_QuickSort();
cout << "------------------------------------" << endl;
test_HeapSort();
cout << "------------------------------------" << endl;
test_MergeSort();
cout << "------------------------------------" << endl;
return 0;
}
- Output
StraightInsertSort 10000 rand numbers .The run time is 11859 ms .------------------------------------BinaryStraightInsertSort 10000 rand numbers .The run time is 5609 ms .------------------------------------TwoRoadInsertSort 10000 rand numbers .The run time is 4109 ms .------------------------------------QuickSort 10000 rand numbers .The run time is 31 ms .------------------------------------STL_QuickSort 10000 rand numbers .The run time is 141 ms .------------------------------------HeapSort 10000 rand numbers .The run time is 125 ms .------------------------------------MergeSort 10000 rand numbers .The run time is 375 ms .------------------------------------