给出七大排序的c语言代码
时间: 2023-03-24 18:03:33 浏览: 71
我可以回答这个问题。以下是七大排序的 C 语言代码:
1. 冒泡排序
void bubbleSort(int arr[], int n) {
int i, j;
for (i = ; i < n-1; i++) {
for (j = ; j < n-i-1; j++) {
if (arr[j] > arr[j+1]) {
int temp = arr[j];
arr[j] = arr[j+1];
arr[j+1] = temp;
}
}
}
}
2. 选择排序
void selectionSort(int arr[], int n) {
int i, j, min_idx;
for (i = ; i < n-1; i++) {
min_idx = i;
for (j = i+1; j < n; j++) {
if (arr[j] < arr[min_idx]) {
min_idx = j;
}
}
int temp = arr[i];
arr[i] = arr[min_idx];
arr[min_idx] = temp;
}
}
3. 插入排序
void insertionSort(int arr[], int n) {
int i, key, j;
for (i = 1; i < n; i++) {
key = arr[i];
j = i - 1;
while (j >= && arr[j] > key) {
arr[j+1] = arr[j];
j = j - 1;
}
arr[j+1] = key;
}
}
4. 希尔排序
void shellSort(int arr[], int n) {
int i, j, gap;
for (gap = n/2; gap > ; gap /= 2) {
for (i = gap; i < n; i++) {
int temp = arr[i];
for (j = i; j >= gap && arr[j-gap] > temp; j -= gap) {
arr[j] = arr[j-gap];
}
arr[j] = temp;
}
}
}
5. 归并排序
void merge(int arr[], int l, int m, int r) {
int i, j, k;
int n1 = m - l + 1;
int n2 = r - m;
int L[n1], R[n2];
for (i = ; i < n1; i++) {
L[i] = arr[l + i];
}
for (j = ; j < n2; j++) {
R[j] = arr[m + 1 + j];
}
i = ;
j = ;
k = l;
while (i < n1 && j < n2) {
if (L[i] <= R[j]) {
arr[k] = L[i];
i++;
} else {
arr[k] = R[j];
j++;
}
k++;
}
while (i < n1) {
arr[k] = L[i];
i++;
k++;
}
while (j < n2) {
arr[k] = R[j];
j++;
k++;
}
}
void mergeSort(int arr[], int l, int r) {
if (l < r) {
int m = l + (r - l) / 2;
mergeSort(arr, l, m);
mergeSort(arr, m+1, r);
merge(arr, l, m, r);
}
}
6. 快速排序
int partition(int arr[], int low, int high) {
int pivot = arr[high];
int i = (low - 1);
int j;
for (j = low; j <= high-1; j++) {
if (arr[j] < pivot) {
i++;
int temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
int temp = arr[i+1];
arr[i+1] = arr[high];
arr[high] = temp;
return (i + 1);
}
void quickSort(int arr[], int low, int high) {
if (low < high) {
int pi = partition(arr, low, high);
quickSort(arr, low, pi-1);
quickSort(arr, pi+1, high);
}
}
7. 堆排序
void heapify(int arr[], int n, int i) {
int largest = i;
int l = 2*i + 1;
int r = 2*i + 2;
if (l < n && arr[l] > arr[largest]) {
largest = l;
}
if (r < n && arr[r] > arr[largest]) {
largest = r;
}
if (largest != i) {
int temp = arr[i];
arr[i] = arr[largest];
arr[largest] = temp;
heapify(arr, n, largest);
}
}
void heapSort(int arr[], int n) {
int i;
for (i = n/2 - 1; i >= ; i--) {
heapify(arr, n, i);
}
for (i = n-1; i >= ; i--) {
int temp = arr[];
arr[] = arr[i];
arr[i] = temp;
heapify(arr, i, );
}
}
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