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@ -17,92 +17,92 @@ struct mylist {
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typedef struct mylist MyList;
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/* 前置声明 */
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void extendCapacity(MyList* l);
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void extendCapacity(MyList *list);
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/* 构造函数 */
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void newMyList(MyList* l) {
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l->capacity = 10;
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l->nums = malloc(sizeof(int) * l->capacity);
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l->size = 0;
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l->extendRatio = 2;
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void newMyList(MyList *list) {
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list->capacity = 10;
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list->nums = malloc(sizeof(int) * list->capacity);
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list->size = 0;
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list->extendRatio = 2;
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}
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/* 获取列表长度 */
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int size(MyList* l) {
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return l->size;
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int size(MyList *list) {
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return list->size;
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}
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/* 获取列表容量 */
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int capacity(MyList* l) {
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return l->capacity;
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int capacity(MyList *list) {
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return list->capacity;
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}
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/* 访问元素 */
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int get(MyList* l, int index) {
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assert(index < l->size);
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return l->nums[index];
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int get(MyList *list, int index) {
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assert(index < list->size);
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return list->nums[index];
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}
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/* 更新元素 */
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void set(MyList* l, int index, int num) {
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assert(index < l->size);
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l->nums[index] = num;
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void set(MyList *list, int index, int num) {
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assert(index < list->size);
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list->nums[index] = num;
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}
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/* 尾部添加元素 */
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void add(MyList* l, int num) {
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if (size(l) == capacity(l)) {
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extendCapacity(l); // 扩容
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void add(MyList *list, int num) {
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if (size(list) == capacity(list)) {
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extendCapacity(list); // 扩容
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}
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l->nums[size(l)] = num;
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l->size++;
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list->nums[size(list)] = num;
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list->size++;
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}
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/* 中间插入元素 */
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void insert(MyList* l, int index, int num) {
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assert(index < size(l));
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for (int i=size(l); i>index; --i) {
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l->nums[i] = l->nums[i-1];
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void insert(MyList *list, int index, int num) {
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assert(index < size(list));
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for (int i = size(list); i > index; --i) {
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list->nums[i] = list->nums[i-1];
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}
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l->nums[index] = num;
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l->size++;
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list->nums[index] = num;
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list->size++;
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}
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/* 删除元素 */
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// 由于引入了 stdio.h ,此处无法使用 remove 关键词
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// 详见 https://github.com/krahets/hello-algo/pull/244#discussion_r1067863888
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int removeNum(MyList* l, int index) {
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assert(index < size(l));
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int num = l->nums[index];
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for (int i=index; i<size(l)-1; i++) {
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l->nums[i] = l->nums[i+1];
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int removeNum(MyList *list, int index) {
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assert(index < size(list));
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int num = list->nums[index];
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for (int i = index; i < size(list) - 1; i++) {
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list->nums[i] = list->nums[i+1];
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}
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l->size--;
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list->size--;
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return num;
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}
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/* 列表扩容 */
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void extendCapacity(MyList* l) {
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void extendCapacity(MyList *list) {
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// 先分配空间
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size_t newCapacity = capacity(l) * l->extendRatio;
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int newCapacity = capacity(list) * list->extendRatio;
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int *extend = (int *)malloc(sizeof(int) * newCapacity);
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int *temp = l->nums;
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int *temp = list->nums;
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// 拷贝旧数据到新数据
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for(size_t i=0; i<size(l); i++)
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extend[i] = l->nums[i];
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for(int i = 0; i < size(list); i++)
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extend[i] = list->nums[i];
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// 释放旧数据
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free(temp);
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// 更新新数据
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l->nums = extend;
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l->capacity = newCapacity;
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list->nums = extend;
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list->capacity = newCapacity;
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}
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/* 将列表转换为 Array 用于打印 */
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int* toArray(MyList* l) {
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return l->nums;
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int* toArray(MyList *list) {
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return list->nums;
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}
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int main() {
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