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169 lines
3.4 KiB
169 lines
3.4 KiB
/**
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* File: list.c
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* Created Time: 2022-01-12
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* Author: Zero (glj0@outlook.com)
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*/
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#include "../include/include.h"
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#include <assert.h>
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typedef int ElemType;
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#define MAX_ELEM_SIZE 10
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// 用数组实现 list
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struct list {
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ElemType* nums;
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size_t numsCapacity;
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size_t numsSize;
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bool isInit;
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};
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typedef struct list List;
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void listInit(List* l) {
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if (l->isInit != true) {
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l->numsCapacity = MAX_ELEM_SIZE;
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l->nums = malloc(sizeof(ElemType) * l->numsCapacity);
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l->numsSize = 0;
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l->isInit = true;
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}
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}
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size_t listSize(List* l) {
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return l->numsSize;
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}
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size_t listCapacity(List* l) {
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return l->numsCapacity;
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}
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ElemType listGet(List* l, int idx) {
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if (l->isInit) {
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if (idx < l->numsSize) {
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return l->nums[idx];
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}
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}
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assert("out_of_range");
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}
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void listSet(List* l, int idx, ElemType elem) {
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if (l->isInit) {
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if (idx < l->numsSize) {
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l->nums[idx] = elem;
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}
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}
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assert("listSet elem assert.");
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}
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void listExtendCapacity(List* l) {
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}
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void listAdd(List* l, ElemType elem) {
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if (listSize(l) == listCapacity(l)) {
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listExtendCapacity(l); // 扩容
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}
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l->nums[listSize(l)] = elem;
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l->numsSize ++;
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}
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void listInsert(List* l, size_t idx, ElemType elem) {
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if (l->isInit) {
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if (idx < listSize(l)) {
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for (size_t i=listSize(l); i>idx; --i) {
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l->nums[i] = l->nums[i-1];
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}
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l->nums[idx] = elem;
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l->numsSize++;
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} else {
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// 越界 -- 抛出异常
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}
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} else {
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// 抛出异常
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}
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}
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ElemType listRemove(List* l, int idx) {
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if (l->isInit) {
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if (idx < listSize(l)) {
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size_t i = idx;
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if ( i != listSize(l)-1) {
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for (; i<listSize(l)-1; i++) {
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l->nums[i] = l->nums[i+1];
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}
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}
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l->numsSize--;
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} else {
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// 数组越界
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}
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} else {
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// 抛出异常
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}
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}
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void listClear(List* l) {
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l->numsSize = 0;
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}
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void printList(List* l) {
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size_t i=0;
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printf("[");
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if (l->numsSize) {
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for (; i<l->numsSize-1; i++) {
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printf("%d, ", l->nums[i]);
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}
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printf("%d", l->nums[i]);
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}
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printf("]\r\n");
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}
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int main() {
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List list;
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/* 初始化列表 */
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listInit(&list);
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listAdd(&list, 1);
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listAdd(&list, 3);
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listAdd(&list, 2);
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listAdd(&list, 5);
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listAdd(&list, 4);
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printf("列表 list = ");
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printList(&list);
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/* 访问元素 */
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int num = listGet(&list, 1);
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printf("访问索引 1 处的元素,得到 num = %d\r\n", num);
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/* 更新元素 */
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listSet(&list, 1, 0);
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printf("将索引 1 处的元素更新为 0 ,得到 list = ");
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printList(&list);
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/* 清空列表 */
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listClear(&list);
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printf("清空列表后 list = ");
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printList(&list);
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/* 尾部添加元素 */
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listAdd(&list, 1);
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listAdd(&list, 3);
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listAdd(&list, 2);
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listAdd(&list, 5);
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listAdd(&list, 4);
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printf("添加元素后 list = ");
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printList(&list);
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/* 中间插入元素 */
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listInsert(&list, 3, 6);
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printf("在索引 3 处插入数字 6 ,得到 list = ");
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printList(&list);
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/* 删除元素 */
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listRemove(&list, 3);
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printf("删除索引 3 处的元素,得到 list = ");
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printList(&list);
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} |