Store .txt file into a char* 2d Vector C++ - c++

Question

I know there are lots of questions with similar titles here, but no one seems to work for me.
I have this kind of txt file:
tree pine
color blue
food pizza
and I want to store the items in a char* 2d vector, such as
vector<vector<char*>> data;
..
..
data[0][0] = tree
data[0][1] = pine
data[1][1] = blue
ecc
This is the code:
// parse configuration file
bool Configuration::fileParser(char* filename)
{
vector<vector<char*>> data;
fstream fin("data/setup.txt");
string line;
while (fin && getline(fin, line))
{
vector<char*> confLine;
char* word = NULL;
stringstream ss(line);
while (ss && ss >> word)
{
confLine.push_back(word);
}
data.push_back(confLine);
}
storeData(data);
return 0;
}
But when I run the code an exception is thrown.
Exception thrown: write access violation.
How can I solve this problem?
Thank you

Answer 1

You haven't allocated any memory into which the data can be written. You'd need something like char* word = new char[50];. But just use a std::string it is safer and easier.

Answer 2

Disclaimer: I do not have a compiler on hand to test the following code with files, but it should work.
Here is a reference I used: Parse (split) a string in C++ using string delimiter (standard C++)
Discription: Basically the following code parses the passed in file line by line then assigns the first word and second word into the vector. Notice that I used string(s) in the example because I didn't want to think about memory management.
#pragma once
#include <vector>
#include <fstream>
#include <string>
void Configuration::fileParser(string fileName)
{
vector<vector<string>> data;
ifstream configFile(fileName);
string line, token;
string delimiter = " ";
size_t pos;
if (configFile.is_open())
{
int n = 0;
while (getline(configFile, line))
{
if (!line || line == "")
break; //added as a safety measure
pos = 0;
if ((pos = line.find(delimiter)) != string::npos)
{
token = line.substr(0, pos);
data[n][0] = token; //add first word to vector
line.erase(0, pos + delimiter.length());
}
if ((pos = line.find(delimiter)) != string::npos)
{
token = line.substr(0, pos);
data[n][1] = token; //add second word to vector
line.erase(0, pos + delimiter.length());
}
n++;
}
}
storeData(data);
}