C语言各种排序算法

冒泡排序

void BubbleSort(int *arr, int size)  
{  
    int i, j, tmp;  
    for (i = 0; i < size - 1; i++) {  
        for (j = 0; j < size - i - 1; j++) {  
            if (arr[j] > arr[j+1]) {  
                tmp = arr[j];  
                arr[j] = arr[j+1];  
                arr[j+1] = tmp;  
            }  
        }  
    }  
}

选择排序

void SelectionSort(int *arr, int size)
{
    int i, j, k, tmp;
    for (i = 0; i < size - 1; i++) {
        k = i;
        for (j = i + 1; j < size; j++) {
            if (arr[j] < arr[k]) {
                k = j;
            }
        }
        tmp = arr[k];
        arr[k] = arr[i];
        arr[i] = tmp;
    }
}

插入排序

void InsertionSort(int *arr, int size)    
{    
    int i, j, tmp;    
    for (i = 1; i < size; i++) {    
        if (arr[i] < arr[i-1]) {    
            tmp = arr[i];    
            for (j = i - 1; j >= 0 && arr[j] > tmp; j--) {  
                arr[j+1] = arr[j];    
            }  
            arr[j+1] = tmp;    
        }          
    }    
}    

希尔排序

void ShellSort(int *arr, int size)  
{  
    int i, j, tmp, increment;  
    for (increment = size/ 2; increment > 0; increment /= 2) {    
        for (i = increment; i < size; i++) {  
            tmp = arr[i];  
            for (j = i - increment; j >= 0 && tmp < arr[j]; j -= increment) {  
                arr[j + increment] = arr[j];  
            }  
            arr[j + increment] = tmp;
        }  
    }  
}  

归并排序

#define MAXSIZE 100  
 
void Merge(int *SR, int *TR, int i, int middle, int rightend) 
{
    int j, k, l;  
    for (k = i, j = middle + 1; i <= middle && j <= rightend; k++) {  
        if (SR[i] < SR[j]) {
            TR[k] = SR[i++];
        } else { 
            TR[k] = SR[j++];
        }  
    }  
    if (i <= middle) {
        for (l = 0; l <= middle - i; l++) {
            TR[k + l] = SR[i + l];
        }  
    }  
    if (j <= rightend) {
        for (l = 0; l <= rightend - j; l++) {
            TR[k + l] = SR[j + l];  
        }
    }  
}  
  
void MergeSort(int *SR, int *TR1, int s, int t) 
{  
    int middle;  
    int TR2[MAXSIZE + 1];  
    if (s == t) {
        TR1[s] = SR[s]; 
    } else {  
        middle = (s + t) / 2;
        MergeSort(SR, TR2, s, middle);
        MergeSort(SR, TR2, middle + 1, t);
        Merge(TR2, TR1, s, middle, t);
    }  
}  

快速排序

void QuickSort(int *arr, int maxlen, int begin, int end)  
{  
    int i, j;  
    if (begin < end) {  
        i = begin + 1;  
        j = end;        
        while (i < j) {  
            if(arr[i] > arr[begin]) {  
                swap(&arr[i], &arr[j]); 
                j--;  
            } else {  
                i++; 
            }  
        }  
        if (arr[i] >= arr[begin]) {  
            i--;  
        }  
        swap(&arr[begin], &arr[i]);      
        QuickSort(arr, maxlen, begin, i);  
        QuickSort(arr, maxlen, j, end);  
    }  
}  
 
void swap(int *a, int *b)    
{  
    int temp;  
    temp = *a;  
    *a = *b;  
    *b = temp;  
}  

堆排序

void Heapify(int *arr, int m, int size)  
{  
    int i, tmp;  
    tmp = arr[m];  
    for (i = 2 * m; i <= size; i *= 2) {  
        if (i + 1 <= size && arr[i] < arr[i+1]) {  
            i++;  
        }  
        if (arr[i] < tmp) {  
            break;  
        }  
        arr[m] = arr[i];  
        m = i;  
    }  
    arr[m] = tmp;  
}  
  
void BulidHeap(int *arr, int size)
{  
    int i;  
    for (i = n / 2; i > 0; i--) {  
        Heapify(arr, i, size);  
    }  
}  
    
void swap(int *arr, int i, int j)  
{  
    int tmp;  
    tmp = arr[i];  
    arr[i] = arr[j];  
    arr[j] = tmp;  
}  
  
void HeapSort(int *arr, int size)  
{  
    int i;  
    BulidHeap(arr, size);  
    for (i = size; i > 1; i--) {  
        swap(arr, 1, i);
        Heapify(arr, 1, i - 1);
    }  
}  

计数排序

void CountingSort(int *A, int *B, int n, int k)  
{  
    int *C = (int *)malloc(sizeof(int) * (k + 1));  
    int i;  
    for (i = 0; i <= k; i++) {  
        C[i] = 0;  
    }  
    for (i = 0; i < n; i++) {  
        C[A[i]]++;  
    }  
    for (i = 1; i <= k; i++) {  
        C[i] = C[i] + C[i - 1];  
    }  
    for (i = n - 1; i >= 0; i--) {  
        B[C[A[i]] - 1] = A[i];  
        C[A[i]]--;  
    }  
}  

桶排序

void bucketSort(int *arr, int size, int max)
{
    int i,j;
    int buckets[max];
    memset(buckets, 0, max * sizeof(int));
    for (i = 0; i < size; i++) {
        buckets[arr[i]]++; 
    }
    for (i = 0, j = 0; i < max; i++) {
        while((buckets[i]--) >0)
            arr[j++] = i;
    }
}

基数排序

int get_index(int num, int dec, int order)
{
    int i, j, n;
    int index;
    int div;
    for (i = dec; i > order; i--) {
        n = 1;
        for (j = 0; j < dec - 1; j++)
            n *= 10;
        div = num / n;
        num -= div * n;
        dec--;
    }
    n = 1;
    for (i = 0; i < order - 1; i++)
        n *= 10;
    index = num / n;
    return index;
}
 
void RadixSort(int *arr, int len, int dec, int order)
{
    int i, j;
    int index; 
    int tmp[len]; 
    int num[10];
    memset(num, 0, 10 * sizeof(int)); 
    memset(tmp, 0, len * sizeof(int));
 
    if (dec < order) {
        return;
    }
    for (i = 0; i < len; i++) {
        index = get_index(arr[i], dec, order);
        num[index]++; 
    }
 
    for (i = 1; i < 10; i++) {
        num[i] += num[i-1];
    }
    for (i = len - 1; i >= 0; i--) {
        index = get_index(arr[i], dec, order); 
        j = --num[index]; 
        tmp[j] = arr[i]; 
    }
 
    for (i = 0; i < len; i++) {
        arr[i] = tmp[i]; 
    }
    RadixSort(arr, len, dec, order+1);
}