如何在C ++中没有默认构造函数的情况下生成动态空2D数组

Question

I have a class named Test and I'd like to create empty 2D array that will hold instances of that class and than add them later one by one using constructor that accepts parameters.

Basically, I'd just like to reserve memory that I will fill in later with objects. It needs to bee on a heap since I will have class that will generate 2D arrays of different sizes.

This was my first approach but it doesn't really work since Test class doesn't have default constructor:

Test** arr;
arr = new Test*[10];
for (int i = 0; i < 10; i++)
    arr[i] = new Test[10];

[EDIT]

Here is my full test code. All in all, I'm getting wrong values out, it should be numbers from 0 to 99:

#include <iostream>
using namespace std;

class Test {
private:
    short number;
public:
    Test(short n) {
        this->number = n;
    }
    short getNumber() {
        return number;
    }
};

int main() {
    Test** arr;
    arr = new Test*[10*10];
    for (int i = 0; i < 100; i++)
        arr[i] = new Test(i);
    for (int i = 0; i < 10; i++) {
        for (int j = 0; j < 10; j++)
            cout << arr[i][j].getNumber() << " ";
        cout << endl;
    }
}

Answer 1

也许尝试使用带有默认参数的默认构造函数？

Test(int i = 0) {. . .}