用cpp实现一维数组的深拷贝实现二维数组深拷贝

一维数组的深拷贝：

#include <iostream>

using namespace std;

int main()
{
    int arr1[] = {1, 2, 3, 4, 5};
    int size = sizeof(arr1) / sizeof(int);
    int *arr2 = new int[size];

    // 深拷贝
    for (int i = 0; i < size; i++) {
        arr2[i] = arr1[i];
    }

    // 打印arr2
    for (int i = 0; i < size; i++) {
        cout << arr2[i] << " ";
    }
    cout << endl;

    // 释放内存
    delete [] arr2;

    return 0;
}

二维数组的深拷贝：

#include <iostream>

using namespace std;

int main()
{
    int arr1[][3] = {{1, 2, 3}, {4, 5, 6}};
    int row = sizeof(arr1) / sizeof(arr1[0]);    // 行数
    int col = sizeof(arr1[0]) / sizeof(int);    // 列数
    int **arr2 = new int*[row];

    // 分配内存
    for (int i = 0; i < row; i++) {
        arr2[i] = new int[col];
    }

    // 深拷贝
    for (int i = 0; i < row; i++) {
        for (int j = 0; j < col; j++) {
            arr2[i][j] = arr1[i][j];
        }
    }

    // 打印arr2
    for (int i = 0; i < row; i++) {
        for (int j = 0; j < col; j++) {
            cout << arr2[i][j] << " ";
        }
        cout << endl;
    }

    // 释放内存
    for (int i = 0; i < row; i++) {
        delete [] arr2[i];
    }
    delete [] arr2;

    return 0;
}