C语言对关键字序列k={ 12 , 45 , 21 , 12 , 30 , 2 , 68 , 33 },分别进行冒泡排序、选择排序算法、插入排序、快速排序算法,并给出代码
时间: 2024-01-17 17:03:17 浏览: 76
好的,关键字序列k={ 12 , 45 , 21 , 12 , 30 , 2 , 68 , 33 },下面分别给出 C 语言的冒泡排序、选择排序算法、插入排序、快速排序算法的代码实现。
1. 冒泡排序
```c
#include <stdio.h>
void bubble_sort(int arr[], int n) {
int i, j, temp;
for (i = 0; i < n - 1; i++) {
for (j = 0; j < n - 1 - i; j++) {
if (arr[j] > arr[j + 1]) {
temp = arr[j];
arr[j] = arr[j + 1];
arr[j + 1] = temp;
}
}
}
}
int main() {
int arr[] = { 12 , 45 , 21 , 12 , 30 , 2 , 68 , 33 };
int n = sizeof(arr) / sizeof(arr[0]);
int i;
printf("Before sorting: ");
for (i = 0; i < n; i++) {
printf("%d ", arr[i]);
}
bubble_sort(arr, n);
printf("\nAfter sorting: ");
for (i = 0; i < n; i++) {
printf("%d ", arr[i]);
}
return 0;
}
```
2. 选择排序
```c
#include <stdio.h>
void selection_sort(int arr[], int n) {
int i, j, min_idx, temp;
for (i = 0; i < n - 1; i++) {
min_idx = i;
for (j = i + 1; j < n; j++) {
if (arr[j] < arr[min_idx]) {
min_idx = j;
}
}
temp = arr[i];
arr[i] = arr[min_idx];
arr[min_idx] = temp;
}
}
int main() {
int arr[] = { 12 , 45 , 21 , 12 , 30 , 2 , 68 , 33 };
int n = sizeof(arr) / sizeof(arr[0]);
int i;
printf("Before sorting: ");
for (i = 0; i < n; i++) {
printf("%d ", arr[i]);
}
selection_sort(arr, n);
printf("\nAfter sorting: ");
for (i = 0; i < n; i++) {
printf("%d ", arr[i]);
}
return 0;
}
```
3. 插入排序
```c
#include <stdio.h>
void insertion_sort(int arr[], int n) {
int i, j, key;
for (i = 1; i < n; i++) {
key = arr[i];
j = i - 1;
while (j >= 0 && arr[j] > key) {
arr[j + 1] = arr[j];
j--;
}
arr[j + 1] = key;
}
}
int main() {
int arr[] = { 12 , 45 , 21 , 12 , 30 , 2 , 68 , 33 };
int n = sizeof(arr) / sizeof(arr[0]);
int i;
printf("Before sorting: ");
for (i = 0; i < n; i++) {
printf("%d ", arr[i]);
}
insertion_sort(arr, n);
printf("\nAfter sorting: ");
for (i = 0; i < n; i++) {
printf("%d ", arr[i]);
}
return 0;
}
```
4. 快速排序
```c
#include <stdio.h>
void quick_sort(int arr[], int low, int high) {
int i, j, pivot, temp;
if (low < high) {
pivot = low;
i = low;
j = high;
while (i < j) {
while (arr[i] <= arr[pivot] && i <= high) {
i++;
}
while (arr[j] > arr[pivot] && j >= low) {
j--;
}
if (i < j) {
temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
temp = arr[j];
arr[j] = arr[pivot];
arr[pivot] = temp;
quick_sort(arr, low, j - 1);
quick_sort(arr, j + 1, high);
}
}
int main() {
int arr[] = { 12 , 45 , 21 , 12 , 30 , 2 , 68 , 33 };
int n = sizeof(arr) / sizeof(arr[0]);
int i;
printf("Before sorting: ");
for (i = 0; i < n; i++) {
printf("%d ", arr[i]);
}
quick_sort(arr, 0, n - 1);
printf("\nAfter sorting: ");
for (i = 0; i < n; i++) {
printf("%d ", arr[i]);
}
return 0;
}
```
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