24.二维数组

#include<iostream>

using namespace std;

//打印二维数组

void print(int arr1[2][3])

{

    for (int i = 0; i < 2; i++)

    {

        for (int j = 0; j < 3; j++)

        {

            cout << arr1[i][j] << " ";

        }

        cout << endl;

    }

}

int main()

{

    //二维数组定义方式

    //1.数据类型 数组名[行数][列数]

    int arr1[2][3];

    arr1[0][0] = 1;

    arr1[0][1] = 2;

    arr1[0][2] = 3;

    arr1[1][0] = 4;

    arr1[1][1] = 5;

    arr1[1][2] = 6;

    //print(arr1);

    //cout << arr1[0][0] << endl;

    //2.数据类型 数组名[行数][列数]={{数据1，数据2}，{数据3，数据4}}；

    int arr2[2][3] =

    {

        {0,1,2},

        {3,4,5}

     };

    //print(arr2);

    //3.数据类型 数组名[行数][列数]={数据1，数据2，数据3，数据4}

    int arr3[2][3] = { 1,2,3,4,5,6 };

    //print(arr3);

    //4.数据类型 数组名[][列数]={数据1，数据2，数据3，数据4}

    int arr4[][3] = { 1,2,3,4,5,6 };

    print(arr4);

    cout <<"一共有"<< sizeof(arr4) / sizeof(arr4[0][0])<<"个元素" << endl;//元素个数

    cout <<"数组首地址"<<(int)arr4 << endl;//数组首地址

    int num = 1;

    for (int i = 0; i < 2; i++)

    {

        for (int j = 0; j < 3; j++)

        {

            cout <<"第"<<num<< "个元素地址:" << endl;

            cout <<(int)&arr4[i][j] << endl;//每个元素地址

            num++;

        }

    }

    cout << "第一行占用内存"<<sizeof(arr4[0]) << endl;

    cout << "二维数组行数：" << sizeof(arr4) / sizeof(arr4[0]) << endl;

    cout << "二维数组列数：" << sizeof(arr4[0]) / sizeof(arr4[0][0]) << endl;

    cout << "第一行首地址：" << (int)arr4[0] << endl;//与第一个元素和数组首地址重合

    cout << "第二首地址：" << (int)arr4[1] << endl;

    system("pause");

    return 0;

}