常见的几种排序算法

sort.c

#include
#include
#include
#define LeftChild(i) (2*(i)+1)
#define Cutoff (3)
#define MaxM 100
#define BucketCap 10
#define BitsOfNum 10

typedef int ElementType;
void InsertionSort(ElementType A[], int N)
{
    int j, P;
    ElementType Tmp;
    for (P = 1; P < N; P++)
    {
        Tmp = A[P];
        for (j = P; j > 0 && A[j - 1] > Tmp; j--)
            A[j] = A[j - 1];
        A[j] = Tmp;
    }
}
void BubbleSort(ElementType A[], int N)
{
    ElementType Tmp;
    for (int i = N - 1; i > 0; i--)
    {
        int k = 0;
        for (int j = i; j > 0; j--)
        {
            if (A[k] > A[k + 1])
            {
                int t = A[k];
                A[k] = A[k + 1];
                A[k + 1] = t;
            }
            k++;
        }
    }
}
void SelectionSort(ElementType A[], int N)
{
    for (int i = 0; i < N - 1; i++)
        for (int j = i + 1; j < N; j++)
        {
            if (A[i] > A[j])
            {
                int t = A[i];
                A[i] = A[j];
                A[j] = t;
            }
        }
}
void ShellSort(ElementType A[], int N)
{
    int i, j, Increment;
    ElementType Tmp;
    for (Increment = N / 2; Increment>0; Increment /= 2)
        for (i = Increment; i < N; i++)
        {
            Tmp = A[i];
            for (j = i; j >= Increment; j -= Increment)
                if (Tmp < A[j-Increment])
                    A[j] = A[j - Increment];
                else
                    break;
            A[j] = Tmp;
        }
}
void PercDown(ElementType A[], int i, int N)
{
    int Child;
    ElementType Tmp;
    for (Tmp = A[i]; LeftChild(i) < N; i = Child)
    {
        Child = LeftChild(i);
        if (Child != N - 1 && A[Child + 1] > A[Child])
            Child++;
        if (Tmp < A[Child])
            A[i] = A[Child];
        else
            break;
    }
    A[i] = Tmp;
}
void Swap(int *a, int *b)
{
    int t = *a;
    *a = *b;
    *b = t;
}
void HeapSort(ElementType A[], int N)
{
    int i;
    for (i = N / 2; i >= 0; i--)
        PercDown(A, i, N);
    for (i = N - 1; i >= 0; i--)
    {
        Swap(&A[0], &A[i]);
        PercDown(A, 0, i);
    }
}
void Merge(ElementType A[], ElementType TmpArray[], int Lpos, int Rpos, int REnd)
{
    int i, LEnd, NumElements, TmpPos;
    LEnd = Rpos - 1;
    TmpPos = Lpos;
    NumElements = REnd - Lpos + 1;
    while (Lpos <= LEnd&&Rpos <= REnd)
        if (A[Lpos] <= A[Rpos])
            TmpArray[TmpPos++] = A[Lpos++];
        else
            TmpArray[TmpPos++] = A[Rpos++];
    while (Lpos <= LEnd)
        TmpArray[TmpPos++] = A[Lpos++];
    while (Rpos <= REnd)
        TmpArray[TmpPos++] = A[Rpos++];
    for (int i = 0; i < NumElements; i++, REnd--)
        A[REnd] = TmpArray[REnd];
}
void MSort(ElementType A[], ElementType TmpArray[], int Left, int Right)
{
    int Center;
    if (Left < Right)
    {
        Center = (Left + Right) / 2;
        MSort(A, TmpArray, Left, Center);
        MSort(A, TmpArray, Center + 1, Right);
        Merge(A, TmpArray, Left, Center + 1, Right);
    }
}
void MergeSort(ElementType A[], int N)
{
    ElementType *TmpArray;
    TmpArray = (ElementType*)malloc(sizeof(ElementType)*N);
    if (TmpArray != NULL)
    {
        MSort(A, TmpArray, 0, N - 1);
        free(TmpArray);
    }
    else
    {
        printf("FAILURE!\n");
        exit(EXIT_FAILURE);
    }
}
ElementType Median3(ElementType A[], int Left, int Right)
{
    int Center = (Left + Right) / 2;
    if (A[Left] > A[Center])
        Swap(&A[Left], &A[Center]);
    if (A[Left] > A[Right])
        Swap(&A[Left], &A[Right]);
    if (A[Center] > A[Right])
        Swap(&A[Center], &A[Right]);
    Swap(&A[Center], &A[Right - 1]);
    return A[Right - 1];
}
void QSort(ElementType A[], int Left, int Right)
{
    int i, j;
    ElementType Pivot;
    if (Left + Cutoff <= Right)
    {
        Pivot = Median3(A, Left, Right);
        i = Left;
        j = Right - 1;
        for (;;)
        {
            while (A[++i] < Pivot);
            while (A[--j] > Pivot);
            if (i < j)
                Swap(&A[i], &A[j]);
            else
                break;
        }
        Swap(&A[i], &A[Right - 1]);
        QSort(A, Left, i - 1);
        QSort(A, i + 1, Right);
    }
    else
        InsertionSort(A + Left, Right - Left + 1);
}
void QuickSort(ElementType A[], int N)
{
    QSort(A, 0, N - 1);
}
void QSelect(ElementType A[], int k, int Left, int Right)
{
    int i, j;
    ElementType Pivot;
    if (Left + Cutoff <= Right)
    {
        Pivot = Median3(A, Left, Right);
        i = Left;
        j = Right - 1;
        for (;;)
        {
            while (A[++i] < Pivot);
            while (A[--j] < Pivot);
            if (i < j)
                Swap(&A[i], &A[j]);
            else
                break;
        }
        Swap(&A[i], &A[Right - 1]);
        if (k <= i)
            QSelect(A, k, Left, i - 1);
        else
            QSelect(A, k, i + 1, Right);
    }
    else
        InsertionSort(A + Left, Right - Left + 1);
}
void BucketSort(ElementType A[], int N)
{
    int* TmpArray = (int *)malloc(sizeof(int)*MaxM);
    memset(TmpArray, 0, sizeof(int)*MaxM);
    for (int i = 0; i < N; i++)
        TmpArray[A[i]]++;
    int Acnt = 0;
    for (int i = 0; i < MaxM; i++)
    {
        for (int j = TmpArray[i]; j > 0; j--)
            A[Acnt++] = i;
        if (Acnt == N)
            break;
    }
    free(TmpArray);
}
int GetBit(ElementType Num, int n)
{
    while (--n)
        Num /= 10;
    return Num % 10;
}
void RadixSort(ElementType A[], int N)
{
    int *Bucket[BucketCap];
    for (int i = 0; i < BucketCap; i++)
    {
        Bucket[i] = (int *)malloc(sizeof(int)*(N+1));
        Bucket[i][0] = 0;
    }
    for (int i = 1; i <= BitsOfNum; i++)
    {
        for (int j = 0; j < N; j++)
        {
            int NumOfBit = GetBit(A[j], i);
            int index = ++Bucket[NumOfBit][0];
            Bucket[NumOfBit][index] = A[j];
        }
        int Acnt = 0;
        for (int k = 0; k < BucketCap; k++)
        {
            for (int m = 1; m <= Bucket[k][0]; m++)
                A[Acnt++] = Bucket[k][m];
            Bucket[k][0] = 0;
            if (Acnt == N)
                break;
        }
    }
    for (int i = 0; i < BucketCap; i++)
        free(Bucket[i]);
}

int main()
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    int n;
    scanf("%d", &n);
    int *arr = (int *)malloc(sizeof(int)*n);
    for (int i = 0; i < n; i++)
        scanf("%d", &arr[i]);
    //InsertionSort(arr, n);
    //BubbleSort(arr, n);
    //SelectionSort(arr, n);
    //ShellSort(arr, n);
    //HeapSort(arr, n);
    //MergeSort(arr, n);
    //QuickSort(arr, n);
    //BucketSort(arr, n);
    //RadixSort(arr, n);
    for (int i = 0; i < n; i++)
        printf("%4d", arr[i]);
    printf("\n");
    return 0;
}