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 发表于 2021-11-17 20:20:39
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| 本帖最后由 人造人 于 2021-11-17 20:27 编辑 
 你的描述不是很清楚,我按照我的理解写了一个,不知道是不是你期望的,我感觉应该不是
 
 main.c
 
 复制代码#include "list.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
list_t *split(const char *str, char sep) {
    list_t *res = list_init();
    const char *begin = str;
    for(size_t i = 0; ; ++i) {
        if(*begin == '\0') break;
        if(str[i] == '\0' || str[i] == sep) {
            size_t size = &str[i] - begin;
            char *temp = malloc(size + 1);
            memcpy(temp, begin, size);
            temp[size] = '\0';
            list_append(res, temp, size + 1);
            free(temp);
            begin = str[i] != '\0' ? &str[i] + 1 : &str[i];
        }
    }
    return res;
}
int main(void) {
    char buff[1024]; fgets(buff, 1024, stdin);
    buff[strlen(buff) - 1] = '\0';
    list_t *list = split(buff, ' ');
    for(size_t i = 0; i < list_size(list); ++i) {
        list_get(list, i, buff, 1024);
        puts(buff);
    }
    list_deinit(list);
    return 0;
}
 list.h
 
 复制代码#ifndef _LIST_H_
#define _LIST_H_
#include <stddef.h>
#include <stdbool.h>
struct list_node_tag {
    void *data; size_t size;
    struct list_node_tag *next;
};
typedef struct {
    struct list_node_tag *head;
    size_t size;
} list_t;
list_t *list_init(void);
void list_deinit(list_t *list);
bool list_clean(list_t *list);
bool list_insert(list_t *list, size_t index, const void *data, size_t size);
bool list_delete(list_t *list, size_t index);
bool list_get(const list_t *list, size_t index, void *data, size_t size);
bool list_append(list_t *list, const void *data, size_t size);
size_t list_size(const list_t *list);
bool list_empty(const list_t *list);
#endif
 list.c
 
 复制代码#include "list.h"
#include <stdlib.h>
#include <memory.h>
list_t *list_init(void) {
    list_t *list = malloc(sizeof(*list));
    if(!list) return NULL;
    list->head = NULL;
    list->size = 0;
    return list;
}
void list_deinit(list_t *list) {
    if(!list) return;
    list_clean(list);
    free(list);
}
bool list_clean(list_t *list) {
    if(!list) return false;
    while(!list_empty(list)) list_delete(list, 0);
    return true;
}
bool list_insert(list_t *list, size_t index, const void *data, size_t size) {
    if(!list) return false;
    if(list_size(list) < index) return false;
    if(!data) return false;
    struct list_node_tag **current = &list->head;
    while(index--) current = &(*current)->next;
    struct list_node_tag *node = malloc(sizeof(*node));
    if(!node) return false;
    node->data = malloc(size);
    if(!node->data) {free(node); return false;}
    memcpy(node->data, data, size);
    node->size = size;
    node->next = *current;
    *current = node;
    ++list->size;
    return true;
}
bool list_delete(list_t *list, size_t index) {
    if(!list) return false;
    if(list_size(list) <= index) return false;
    struct list_node_tag **current = &list->head;
    while(index--) current = &(*current)->next;
    struct list_node_tag *temp = *current;
    *current = temp->next;
    free(temp->data); free(temp);
    --list->size;
    return true;
}
bool list_get(const list_t *list, size_t index, void *data, size_t size) {
    if(!list) return false;
    if(list_size(list) <= index) return false;
    if(!data) return false;
    struct list_node_tag *const *current = &list->head;
    while(index--) current = &(*current)->next;
    struct list_node_tag *temp = *current;
    if(temp->size > size) return false;
    memcpy(data, temp->data, temp->size);
    return true;
}
bool list_append(list_t *list, const void *data, size_t size) {
    if(!list) return false;
    return list_insert(list, list_size(list), data, size);
}
size_t list_size(const list_t *list) {
    if(!list) return 0;
    return list->size;
}
bool list_empty(const list_t *list) {
    if(!list) return true;
    return list_size(list) == 0;
}
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