Insert value at the beginning and the end of 2d vector

[yat89]

Hi everyone. I am new to c++ programming. Given a task to insert zero at the beginning and the end of each row of 2d vector. I had try to code it but errors occurred. I don't know how to solve it. Hope someone can help me. Thanks.

Here is the input file:
1 2 3 4 5 6 7 8 9
9 8 7 6 5 4 3 2 1
5 4 3 2 1 9 8 7 6

#include <iostream> 
#include <vector> 
#include <iomanip>	// setw
#include <fstream>

using namespace std;

const int m = 3;
const int n = 9;

vector<vector<int> > route(m, vector <int>(n, 0));

int main()
{
	// Input file
	ifstream inpData("mydata.txt");

	// Assign route into array 
	cout << "The vector elements before insert '0' are: "; 
		cout << endl;
	for (int i = 0; i < m; i++)
	{
		for (int j = 0; j < n; j++)
		{
			inpData >> route[i][j];
			cout << setw(3) << route[i][j] << ' ';
		}
		cout << endl;
	}
	cout << endl;

	// Close input files
	inpData.close();

	for (int row = 0; row < m; row++)
	{
		
		// inserts 0 at begin of vector
		vector<int>::iterator it = route.insert(route.begin(), 0);
	
		// insert 0 at the end of vector
		vector<int>::iterator it = route.insert(route.end(), 0);
	}

		cout << "The vector elements after insert '0' are: "; 
		cout << endl;
		for (int i = 0; i < m; i++)
		{
			for (int j = 0; j < route[i].size(); j++)
			{
				cout << setw(3) << route[i][j] << ' ';
			}
				cout << endl;
		}
		cout << endl;

		return 0; 
}

The output should be:
0 1 2 3 4 5 6 7 8 9 0
0 9 8 7 6 5 4 3 2 1 0
0 5 4 3 2 1 9 8 7 6 0

[Peter87]

The vector that you want to insert into is route[row].

route[row].insert(route[row].begin(), 0);

[yat89]

Thanks Peter87. Its work after I insert route[row] and remove vector<int>::iterator it = for line 42.

Thank you for your help.