题解 | #创建二维动态数组#

#include<iostream>
#include <vector>
using namespace std;
int main() {
    int n;
    cin >> n;
    // write your code here......
    vector<vector<int>> a(n);

    for (int i = 0; i < n; i++)
    {
        a[i].resize(n);
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            a[i][j] = i + j;
            cout << a[i][j]<<" ";
        }
        cout << endl;
    }

    return 0;
}