以下是使用 C 语言实现几种常见的排序算法的简单示例代码,包括冒泡排序、选择排序、插入排序、快速排序和归并排序。
#include <stdio.h>
void bubbleSort(int arr[], int n) {
for (int i = 0; i < n-1; i++) {
for (int j = 0; j < n-i-1; j++) {
if (arr[j] > arr[j+1]) {
int temp = arr[j];
arr[j] = arr[j+1];
arr[j+1] = temp;
}
}
}
}
int main() {
int array[] = {64, 34, 25, 12, 22, 11, 90};
int n = sizeof(array) / sizeof(array[0]);
bubbleSort(array, n);
printf("Sorted array: ");
for (int i = 0; i < n; i++) {
printf("%d ", array[i]);
}
return 0;
}
2、选择排序(Selection Sort): #include <stdio.h>
void selectionSort(int arr[], int n) {
for (int i = 0; i < n-1; i++) {
int minIndex = i;
for (int j = i+1; j < n; j++) {
if (arr[j] < arr[minIndex]) {
minIndex = j;
}
}
int temp = arr[i];
arr[i] = arr[minIndex];
arr[minIndex] = temp;
}
}
int main() {
int array[] = {64, 34, 25, 12, 22, 11, 90};
int n = sizeof(array) / sizeof(array[0]);
selectionSort(array, n);
printf("Sorted array: ");
for (int i = 0; i < n; i++) {
printf("%d ", array[i]);
}
return 0;
}
3、插入排序(Insertion Sort): #include <stdio.h>
void insertionSort(int arr[], int n) {
for (int i = 1; i < n; i++) {
int key = arr[i];
int j = i - 1;
while (j >= 0 && arr[j] > key) {
arr[j+1] = arr[j];
j--;
}
arr[j+1] = key;
}
}
int main() {
int array[] = {64, 34, 25, 12, 22, 11, 90};
int n = sizeof(array) / sizeof(array[0]);
insertionSort(array, n);
printf("Sorted array: ");
for (int i = 0; i < n; i++) {
printf("%d ", array[i]);
}
return 0;
}
4、快速排序(Quick Sort):
#include <stdio.h>
void quickSort(int arr[], int low, int high) {
if (low < high) {
int pivot = partition(arr, low, high);
quickSort(arr, low, pivot - 1);
quickSort(arr, pivot + 1, high);
}
}
int partition(int arr[], int low, int high) {
int pivot = arr[high];
int i = low - 1;
for (int j = low; j <= high - 1; j++) {
if (arr[j] < pivot) {
i++;
swap(&arr[i], &arr[j]);
}
}
swap(&arr[i + 1], &arr[high]);
return i + 1;
}
void swap(int* a, int* b) {
int temp = *a;
*a = *b;
*b = temp;
}
int main() {
int array[] = {64, 34, 25, 12, 22, 11, 90};
int n = sizeof(array) / sizeof(array[0]);
quickSort(array, 0, n - 1);
printf("Sorted array: ");
for (int i = 0; i < n; i++) {
printf("%d ", array[i]);
}
return 0;
}
5、归并排序(Merge Sort):
#include <stdio.h>
#include <stdlib.h>
void mergeSort(int arr[], int left, int right) {
if (left < right) {
int middle = left + (right - left) / 2;
mergeSort(arr, left, middle);
mergeSort(arr, middle + 1, right);
merge(arr, left, middle, right);
}
}
void merge(int arr[], int left, int middle, int right) {
int i, j, k;
int n1 = middle - left + 1;
int n2 = right - middle;
int L[n1], R[n2];
for (i = 0; i < n1; i++)
L[i] = arr[left + i];
for (j = 0; j < n2; j++)
R[j] = arr[middle + 1 + j];
i = 0;
j = 0;
k = left;
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++;
}
}
int main() {
int array[] = {64, 34, 25, 12, 22, 11, 90};
int n = sizeof(array) / sizeof(array[0]);
mergeSort(array, 0, n - 1);
printf("Sorted array: ");
for (int i = 0; i < n; i++) {
printf("%d ", array[i]);
}
return 0;
}
这些是一些常见的排序算法的 C 语言实现。每种算法都有其适用的场景和性能特点,选择适当的排序算法取决于具体的需求和数据希望你也学会了,更多编程请来二当家的素材网:https://www.erdangjiade.com