#include <iostream>
#include <cstring>
using namespace std;

class Array2 {
// 在此處補充你的程式碼
};

int main() {
    Array2 a(3,4);
    int i,j;
    for(  i = 0;i < 3; ++i )
        for(  j = 0; j < 4; j ++ )
            a[i][j] = i * 4 + j;
    for(  i = 0;i < 3; ++i ) {
        for(  j = 0; j < 4; j ++ ) {
            cout << a(i,j) << ",";
        }
        cout << endl;
    }
    cout << "next" << endl;
    Array2 b;     b = a;
    for(  i = 0;i < 3; ++i ) {
        for(  j = 0; j < 4; j ++ ) {
            cout << b[i][j] << ",";
        }
        cout << endl;
    }
    return 0;
}
 

首先上面程式碼說明a有一個私有成員二維陣列

private:
	int arr[10][10];

注意到這裡a是一個類例項，又出現a[i][j]說明有一個[]過載，即

int*  Array2::operator [](int i)
{
	return arr[i];    //它是二維陣列arr的第i個元素，即第i個小陣列的首地址，故返回值型別應該為int* 
}

cout<<a(i,j)這裡又是一個過載，實際上是(i,j)過載

//過載操作符 '()'  
int Array2::operator()(int i, int j)
{
	return arr[i][j];
}

接下來是兩個建構函式

//建立預設建構函式
Array2::Array2()
{
	for (int i = 0; i < 10; i++)
		for (int j = 0; j < 10; j++)
		{
			arr[i][j] = 0;
		}
}
//建立建構函式,初始化二維陣列arr
Array2::Array2(int a, int b)
{
	for (int i = 0; i < a; i++)
		for (int j = 0; j < b; j++)
		{
			arr[i][j] = 0;
		}
}

b=a 只用過載拷貝函式即行

Array2::Array2(Array2& c)
{
	for (int i = 0; i < 10; i++)
		for (int j = 0; j < 10; j++)
		{
			arr[i][j] = c.arr[i][j];
		}
}
 

完整程式碼

#include <iostream>
#include <cstring>
using namespace std;
// 在此處補充你的程式碼
//定義一個類Array2
//要過載操作符'[]',支援二維陣列下標
//要過載操作符 '()'
//要進行深度拷貝,建立自己的拷貝建構函式
class Array2
{
private:
	int arr[10][10];
public:
	Array2();
	Array2(int, int);
	int*  operator [](int i);
	int operator()(int i, int j);
	Array2(Array2& c);
};
//建立預設建構函式
Array2::Array2()
{
	for (int i = 0; i < 10; i++)
		for (int j = 0; j < 10; j++)
		{
			arr[i][j] = 0;
		}
}
//建立建構函式,初始化二維陣列arr
Array2::Array2(int a, int b)
{
	for (int i = 0; i < a; i++)
		for (int j = 0; j < b; j++)
		{
			arr[i][j] = 0;
		}
}
//過載操作符'[]',支援二維陣列下標
int*  Array2::operator [](int i)
{
	return arr[i];    //它是二維陣列arr的第i個元素，即第i個小陣列的首地址，故返回值型別應該為int* 
}
//過載操作符 '()'  
int Array2::operator()(int i, int j)
{
	return arr[i][j];
}
//建立自己的拷貝建構函式,進行深度拷貝

Array2::Array2(Array2& c)
{
	for (int i = 0; i < 10; i++)
		for (int j = 0; j < 10; j++)
		{
			arr[i][j] = c.arr[i][j];
		}
}
int main() {
	Array2 a(3, 4);
	int i, j;
	for (i = 0; i < 3; ++i)
		for (j = 0; j < 4; j++)
			a[i][j] = i * 4 + j;  //說明要過載操作符'[]',支援二維陣列下標
	for (i = 0; i < 3; ++i) {
		for (j = 0; j < 4; j++) {
			cout << a(i, j) << ","; //說明要過載操作符 '()'
		}
		cout << endl;
	}
	cout << "next" << endl;
	Array2 b;     b = a;    //說明要進行深度拷貝
	for (i = 0; i < 3; ++i) {
		for (j = 0; j < 4; j++) {
			cout << b[i][j] << ",";
		}
		cout << endl;
	}
	return 0;
}