帮我用c语言链表写一个可以实现多行输入的KWIC索引程序
时间: 2023-04-09 08:01:18 浏览: 60
好的,我可以回答这个问题。以下是一个用C语言链表实现的KWIC索引程序的示例代码:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_LINE_LEN 1000
#define MAX_WORD_LEN 50
typedef struct node {
char *line;
struct node *next;
} Node;
void insert(Node **head, char *line) {
Node *new_node = (Node *)malloc(sizeof(Node));
new_node->line = line;
new_node->next = NULL;
if (*head == NULL) {
*head = new_node;
} else {
Node *curr = *head;
while (curr->next != NULL) {
curr = curr->next;
}
curr->next = new_node;
}
}
void free_list(Node *head) {
Node *curr = head;
while (curr != NULL) {
Node *temp = curr;
curr = curr->next;
free(temp->line);
free(temp);
}
}
void kwic_index(Node *head) {
Node *curr = head;
while (curr != NULL) {
char *line = curr->line;
int len = strlen(line);
char *words[len];
int num_words = 0;
// Split line into words
char *word = strtok(line, " ");
while (word != NULL) {
words[num_words++] = word;
word = strtok(NULL, " ");
}
// Rotate words and print
for (int i = 0; i < num_words; i++) {
for (int j = 0; j < num_words; j++) {
printf("%s ", words[(i+j)%num_words]);
}
printf("\n");
}
curr = curr->next;
}
}
int main() {
Node *head = NULL;
char line[MAX_LINE_LEN];
// Read lines from input
while (fgets(line, MAX_LINE_LEN, stdin) != NULL) {
int len = strlen(line);
if (line[len-1] == '\n') {
line[len-1] = '\0';
}
char *new_line = (char *)malloc((len+1) * sizeof(char));
strcpy(new_line, line);
insert(&head, new_line);
}
// Generate KWIC index
kwic_index(head);
// Free memory
free_list(head);
return 0;
}
```
这个程序可以从标准输入中读取多行输入,并生成KWIC索引。每行输入会被分割成单词,然后对每个单词进行旋转,生成所有可能的旋转结果,并输出到标准输出中。
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