passing a 2d array cpp

1#include <iostream>
2#include <vector>
3using namespace std;
4
5typedef vector< vector<int> > Matrix;
6
7void print(Matrix& m)
8{
9   int M=m.size();
10   int N=m[0].size();
11   for(int i=0; i<M; i++) {
12      for(int j=0; j<N; j++)
13         cout << m[i][j] << " ";
14      cout << endl;
15   }
16   cout << endl;
17}
18
19
20int main()
21{
22    Matrix m = { {1,2,3,4},
23                 {5,6,7,8},
24                 {9,1,2,3} };
25    print(m);
26
27    //To initialize a 3 x 4 matrix with 0:
28    Matrix n( 3,vector<int>(4,0));
29    print(n);
30    return 0;
31}
32