归并排序的c语言代码
时间: 2023-10-16 09:05:41 浏览: 45
以下是归并排序的C语言代码:
```c
#include <stdio.h>
#include <stdlib.h>
void merge(int arr[], int left, int mid, int right) {
int i, j, k;
int n1 = mid - left + 1;
int n2 = right - mid;
int L[n1], R[n2];
// 拷贝数据到临时数组 L[] 和 R[]
for (i = 0; i < n1; i++) {
L[i = arr[left + i];
}
for (j = 0; j < n2; j++) {
R[j = arr[mid + 1 + j];
}
// 合并临时数组到原数组 arr[]
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++;
}
// 处理剩余的元素
while (i < n1) {
arr[k = L[i];
i++;
k++;
}
while (j < n2) {
arr[k = R[j];
j++;
k++;
}
}
void mergeSort(int arr[], int left, int right) {
if (left < right) {
int mid = left + (right - left) / 2;
mergeSort(arr, left, mid);
mergeSort(arr, mid + 1, right);
merge(arr, left, mid, right);
}
}
int main() {
int arr[] = {1, 9, 6, 8, 3, 5, 2, 4};
int n = sizeof(arr) / sizeof(arr<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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