用C语言编写上述代码
时间: 2024-10-12 18:12:44 浏览: 9
当然,以下是使用C语言编写的三种查找算法代码:
(1) 无序链表查找:
```c
typedef struct Node {
int data;
struct Node* next;
} Node;
Node* linearSearchUnsorted(Node* head, int z) {
Node* current = head;
while (current != NULL && current->data != z) {
current = current->next;
}
return current;
}
```
(2) 递增有序链表查找(二分查找):
```c
Node* getMiddle(Node* low, Node* high) {
if (low == high) return low;
Node* mid = low->next;
for (int i = 1; i < (high - low).size / 2; i++) {
mid = mid->next;
}
return mid;
}
Node* binarySearchSorted(Node* head, int z) {
if (head == NULL || head->data > z) return NULL;
Node* low = head;
Node* high = head->next;
while (low != high) {
Node* mid = getMiddle(low, high);
if (mid->data < z) low = mid->next;
else high = mid;
}
return high;
}
```
(3) 递减有序链表查找(二分查找):
```c
Node* binarySearchDecreasingSorted(Node* head, int z) {
if (head == NULL || head->data <= z) return NULL;
Node* low = head;
Node* high = head->prev; // 初始化高指针为前一个节点
while (low != high) {
Node* mid = getMiddle(low, high);
if (mid->data > z) low = mid->prev;
else high = mid;
}
return low;
}
```
注意这里的链表操作可能需要根据实际的数据结构库进行调整。例如,`getMiddle`函数假设链表节点是一个数组,但在实际中可能需要对链表进行迭代计算。
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