Creating a 2D Iterator for vector containing strings data type

[haitianfella]

I have a 2D vector containing strings. I'd like to create a function that iterates through the array. I can't figure out how this function need to be prototyped.

My ideal function would take in the "vector, start state, and goal state" performing a recursive DFS search that outputs the path it took to get the goal state.

I just cant get past the creating the function definition.

Sample data in array

    00 70 03 00 00 00 00 00 00 
    01 71 03 01 00 00 01 00 10 
    02 72 03 02 00 00 02 00 20 
    03 73 03 03 00 03 00 00 30 
    10 70 13 00 10 00 01 00 10 
    11 71 13 01 10 00 02 00 20 
    12 72 13 02 10 03 00 00 30 
    13 73 13 03 10 13 00 00 40 

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <sstream>
#include <vector>
using std::vector;
using namespace std;

string outPutFileName;
vector<vector<string> > array2D;
int rows = 32;
int columns = 9;

int main()
{
    string x;
    string line;
    string filename;
    ifstream infile;
    infile.open("file.txt");

    //error check
    if(infile.fail()) {
        cerr << " The file you are trying to access cannot be found or opened";
        exit(1);
    }

    array2D.resize(rows);
    for(int i = 0; i < rows; ++i) {
        array2D[i].resize(columns);
    }

    int row;

    while(getline(infile, line)) {
        istringstream streamA(line);

        int col = 0;
        while(streamA >> x) {
            array2D[row][col] = x;
            col++;
        }
        row++;
    }

    for(int i = 0; i < rows; i++) {
        for(int j = 0; j < columns; j++) {
            cout << array2D[i][j] << " ";
        }
        cout << endl;
    }

    return 0;
}