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8.2

How do I use getline to read a file into an array?

Asked by vwps in C++ Programming Language

Tags: C++, getline, array

I am trying to read a file into a 2D integer grid array. When I run this code, I get two errors - one at each use of getline. The error is: "no matching function for call to 'getline[(((long unsigned int)(((int)rows) - 1)) + 1u)][(((long unsigned int)(((int)cols) - 1)) + 1u)], int, char)' ". Is something wrong with my input to getline or the integer array? 
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#include <iostream>
#include <fstream> 
using namespace std;
 
int main () 
{
	// open the file
	ifstream sampleGrid("/Users/vshen/Documents/EECS 311/Program 1/sample_grid.txt");
 
	if (sampleGrid)
	{
		cout << "File opened." << endl;
	}
 
	// exit the program if the file can't be opened
	if (!sampleGrid)
	{
		cerr << "File cannot be opened." << endl;
		exit (1);
	}
	
	// figure out the number of rows and columns... or just assume they're 10
	int rows = 10;
	int cols = 10;	
	// create the array that will store the grid
	int rowsread = 0;
	int colsread = 0;
	int myArr[rows][cols];
	
	while(!sampleGrid.eof())
	{
		getline(myArr, 20, '\t');
		if(rowsread == rows)
		{
			rowsread = 0;
			colsread++;
			getline(myArr, 20, '\t');
		}
		rows++;
	}
	return 0;
}
 
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[+][-]04/18/09 08:11 PM, ID: 24177792Expert Comment

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[+][-]04/18/09 08:20 PM, ID: 24177811Accepted Solution

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About this solution

Zone: C++ Programming Language
Tags: C++, getline, array
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Solution Provided By: ewest02
Participating Experts: 3
Solution Grade: A
 
[+][-]04/18/09 08:25 PM, ID: 24177822Expert Comment

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