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数据结构与算法C语言版-排序

插入排序、快速排序、堆排序

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#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
using namespace std;

#define N 10000

int InsertSort(int L[], int n)
{
for (int i = 0; i < n - 1; i++) //循环n-1次
for (int j = i; j >= 0; j--)
if (L[j] > L[j + 1])
swap(L[j], L[j + 1]); //自带函数swap()
return 0;
}
int QuickSort(int L[], int s, int t)
{
if (s >= t)
return 0;

// 对L[s]~L[t]进行划分,并返回划分元素的下标
int temp = L[s]; // 暂存划分元素
int low = s, high = t; //相向移动low和high,对序列划分
while (low < high)
{
// 移动high
while (low < high && L[high] >= temp)
high--;
L[low] = L[high];

// 移动low
while (low < high && L[low] <= temp)
low++;
L[high] = L[low];
}
L[low] = temp; // 放回划分元素
QuickSort(L, s, low - 1);
QuickSort(L, low + 1, t);
return 0;
}

int AdjustHeap(int L[], int s, int n)
{
// 对以L[s]为根的子树进行堆调整
int i = s;
int j = i + i + 1;
while (j <= n) // 找出最大的子结点
{
if (j + 1 <= n && L[j + 1] > L[j])
j++;
if (L[i] > L[j])
break;
swap(L[i], L[j]);
i = j;
j = i + i + 1;
}
return 0;
}
int HeapSort(int L[], int n)
{
for (int i = n / 2 - 1; i >= 0; i--)
AdjustHeap(L, i, n - 1);

for (int i = n - 1; i > 0; i--)
{
swap(L[0], L[i]);
AdjustHeap(L, 0, i - 1);
}
return 0;
}

void Print(int L[], int n)
{
for (int i = 0; i < N; i++)
printf("%d ", L[i]);
}
int isOk(int L[], int n)
{
for (int i = 0; i < n - 1; i++)
if (L[i + 1] < L[i])
return 0;
return 1;
}

int main()
{
srand((unsigned int)time(NULL));
int L1[N], L2[N], L3[N];
for (int i = 0; i < N; i++)
{
L1[i] = rand();
L2[i] = L1[i];
L3[i] = L1[i];
}
//Print(L1, N); //数据太多,有N个,不打印

//插入排序
printf("插入排序Insert Sort:\n");
clock_t c1 = clock();
InsertSort(L1, N);
clock_t c2 = clock();
cout << "Insert sort time = " << c2 - c1 << " ms." << endl;
if (!isOk(L1, N))
cout << "Insert sort error!" << endl;

//快速排序
printf("快速排序Quick Sort:\n");
c1 = clock();
QuickSort(L2, 0, N - 1);
c2 = clock();
cout << "Quick sort time = " << c2 - c1 << " ms." << endl;
if (!isOk(L2, N))
cout << "Quick sort error!" << endl;

//堆排序
printf("堆排序Heap Sort:\n");
c1 = clock();
HeapSort(L3, N);
c2 = clock();
cout << "Heap sort time = " << c2 - c1 << " ms." << endl;
if (!isOk(L3, N))
cout << "Heap sort error!" << endl;

return 0;
}
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