cpp-algo-cases/chapter_array_and_linkedlist/my_list.cpp

/**
 * File: my_list.cpp
 * Created Time: 2022-11-25
 * Author: krahets (krahets@163.com)
 */

#include "../utils/common.hpp"

/* <20>б<EFBFBD><D0B1><EFBFBD> */
class MyList {
  private:
    int *arr;             // <20><><EFBFBD>飨<EFBFBD>洢<EFBFBD>б<EFBFBD>Ԫ<EFBFBD>أ<EFBFBD>
    int arrCapacity = 10; // <20>б<EFBFBD><D0B1><EFBFBD><EFBFBD><EFBFBD>
    int arrSize = 0;      // <20>б<EFBFBD><D0B1><EFBFBD><EFBFBD>ȣ<EFBFBD><C8A3><EFBFBD>ǰԪ<C7B0><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    int extendRatio = 2;   // ÿ<><C3BF><EFBFBD>б<EFBFBD><D0B1><EFBFBD><EFBFBD>ݵı<DDB5><C4B1><EFBFBD>

  public:
    /* <20><><EFBFBD>췽<EFBFBD><ECB7BD> */
    MyList() {
        arr = new int[arrCapacity];
    }

    /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
    ~MyList() {
        delete[] arr;
    }

    /* <20><>ȡ<EFBFBD>б<EFBFBD><D0B1><EFBFBD><EFBFBD>ȣ<EFBFBD><C8A3><EFBFBD>ǰԪ<C7B0><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
    int size() {
        return arrSize;
    }

    /* <20><>ȡ<EFBFBD>б<EFBFBD><D0B1><EFBFBD><EFBFBD><EFBFBD> */
    int capacity() {
        return arrCapacity;
    }

    /* <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA> */
    int get(int index) {
        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD>磬<EFBFBD><E7A3AC><EFBFBD>׳<EFBFBD><D7B3>쳣<EFBFBD><ECB3A3><EFBFBD><EFBFBD>ͬ
        if (index < 0 || index >= size())
            throw out_of_range("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD>");
        return arr[index];
    }

    /* <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA> */
    void set(int index, int num) {
        if (index < 0 || index >= size())
            throw out_of_range("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD>");
        arr[index] = num;
    }

    /* <20><>β<EFBFBD><CEB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA> */
    void add(int num) {
        // Ԫ<><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD>
        if (size() == capacity())
            extendCapacity();
        arr[size()] = num;
        // <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        arrSize++;
    }

    /* <20><><EFBFBD>м<EFBFBD><D0BC><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA> */
    void insert(int index, int num) {
        if (index < 0 || index >= size())
            throw out_of_range("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD>");
        // Ԫ<><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD>
        if (size() == capacity())
            extendCapacity();
        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> index <20>Լ<EFBFBD>֮<EFBFBD><D6AE><EFBFBD><EFBFBD>Ԫ<EFBFBD>ض<EFBFBD><D8B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD>һλ
        for (int j = size() - 1; j >= index; j--) {
            arr[j + 1] = arr[j];
        }
        arr[index] = num;
        // <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        arrSize++;
    }

    /* ɾ<><C9BE>Ԫ<EFBFBD><D4AA> */
    int remove(int index) {
        if (index < 0 || index >= size())
            throw out_of_range("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD>");
        int num = arr[index];
        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> index ֮<><D6AE><EFBFBD><EFBFBD>Ԫ<EFBFBD>ض<EFBFBD><D8B6><EFBFBD>ǰ<EFBFBD>ƶ<EFBFBD>һλ
        for (int j = index; j < size() - 1; j++) {
            arr[j] = arr[j + 1];
        }
        // <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        arrSize--;
        // <20><><EFBFBD>ر<EFBFBD>ɾ<EFBFBD><C9BE><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA>
        return num;
    }

    /* <20>б<EFBFBD><D0B1><EFBFBD><EFBFBD><EFBFBD> */
    void extendCapacity() {
        // <20>½<EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊԭ<CEAA><D4AD><EFBFBD><EFBFBD> extendRatio <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        int newCapacity = capacity() * extendRatio;
        int *tmp = arr;
        arr = new int[newCapacity];
        // <20><>ԭ<EFBFBD><D4AD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><D0B5><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD>ظ<EFBFBD><D8B8>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        for (int i = 0; i < size(); i++) {
            arr[i] = tmp[i];
        }
        // <20>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>
        delete[] tmp;
        arrCapacity = newCapacity;
    }

    /* <20><><EFBFBD>б<EFBFBD>ת<EFBFBD><D7AA>Ϊ Vector <20><><EFBFBD>ڴ<EFBFBD>ӡ */
    vector<int> toVector() {
        // <20><>ת<EFBFBD><D7AA><EFBFBD><EFBFBD>Ч<EFBFBD><D0A7><EFBFBD>ȷ<EFBFBD>Χ<EFBFBD>ڵ<EFBFBD><DAB5>б<EFBFBD>Ԫ<EFBFBD><D4AA>
        vector<int> vec(size());
        for (int i = 0; i < size(); i++) {
            vec[i] = arr[i];
        }
        return vec;
    }
};

/* Driver Code */
int main() {
    /* <20><>ʼ<EFBFBD><CABC><EFBFBD>б<EFBFBD> */
    MyList *nums = new MyList();
    /* <20><>β<EFBFBD><CEB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA> */
    nums->add(1);
    nums->add(3);
    nums->add(2);
    nums->add(5);
    nums->add(4);
    cout << "<EFBFBD>б<EFBFBD> nums = ";
    vector<int> vec = nums->toVector();
    printVector(vec);
    cout << "<EFBFBD><EFBFBD><EFBFBD><EFBFBD> = " << nums->capacity() << " <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> = " << nums->size() << endl;

    /* <20><><EFBFBD>м<EFBFBD><D0BC><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA> */
    nums->insert(3, 6);
    cout << "<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 3 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 6 <20><><EFBFBD>õ<EFBFBD> nums = ";
    vec = nums->toVector();
    printVector(vec);

    /* ɾ<><C9BE>Ԫ<EFBFBD><D4AA> */
    nums->remove(3);
    cout << "ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 3 <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD>أ<EFBFBD><D8A3>õ<EFBFBD> nums = ";
    vec = nums->toVector();
    printVector(vec);

    /* <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA> */
    int num = nums->get(1);
    cout << "<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1 <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD>أ<EFBFBD><D8A3>õ<EFBFBD> num = " << num << endl;

    /* <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA> */
    nums->set(1, 0);
    cout << "<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1 <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD>ظ<EFBFBD><D8B8><EFBFBD>Ϊ 0 <20><><EFBFBD>õ<EFBFBD> nums = ";
    vec = nums->toVector();
    printVector(vec);

    /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD> */
    for (int i = 0; i < 10; i++) {
        // <20><> i = 5 ʱ<><CAB1><EFBFBD>б<EFBFBD><D0B1><EFBFBD><EFBFBD>Ƚ<EFBFBD><C8BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><D0B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD>
        nums->add(i);
    }
    cout << "<EFBFBD><EFBFBD><EFBFBD>ݺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD> nums = ";
    vec = nums->toVector();
    printVector(vec);
    cout << "<EFBFBD><EFBFBD><EFBFBD><EFBFBD> = " << nums->capacity() << " <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> = " << nums->size() << endl;

    // <20>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>
    delete nums;

    return 0;
}