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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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