c++随机生成二维数组

以下是使用C++随机生成二维数组的示例代码：

#include <iostream>
#include <stdlib.h>
#include <time.h>

using namespace std;

int** generateRandomArray(int n, int m) {
    int** arr = new int*[n];
    srand((unsigned)time(NULL));
    for (int i = 0; i < n; i++) {
        arr[i] = new int[m];
        for (int j = 0; j < m; j++) {
            arr[i][j] = (rand() % 900) + 100;
        }
    }
    return arr;
}

void printArray(int** arr, int n, int m) {
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cout << arr[i][j] << " ";
        }
        cout << endl;
    }
}

int main() {
    int n, m;
    cin >> n >> m;
    int** arr = generateRandomArray(n, m);
    printArray(arr, n, m);
    return 0;
}