How to save file data into 2-d array

[razgriz4002]

I can save my file data into array now, but don't know how to put into 2-d array.

This is my program:

#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
#include <iomanip>
#include <sstream>
#include <cmath>

using namespace std;

int main(){
	const int DATA_SIZE = 15;
	const int NUMROWS = 5;
	const int NUMCOLS = 3;
	int i, j;

	double data[DATA_SIZE];

	ifstream  input_stream(data.txt");
	if ( !input_stream.fail())
	{
		for (int n = 0; n < DATA_SIZE; n++)
		{
			 input_stream >> data[n];
			 cout << data[n] << endl;
		}
			

		double val[NUMROWS][NUMCOLS] = data[DATA_SIZE];



		for (i = 0; i < NUMROWS; i++)
		{ cout << endl;
			for ( j = 0; j < NUMCOLS; j++)
			{
				
				cout << setprecision(4) << val [i][j] << " " ;
			}
		}
		cout << endl;

		 input_stream.close();
	}

	else 
		cout << "Unable to open file" << endl;
	

	system("pause");
	return 0;
} 

Can anyone help me with it?

[pogrady]

When you specify a position in an array you are essentially accessing a pointer to a memory location. In order to write to each member you would need to iterate through each location ofthe array and assign a value.