Issues reading string from file and splitting

[recordedchaos]

I am having an issue reading in lines from a file, converting each into a string, then splitting that string into components (Int, string, double), and then printing them out. It works fine up until element number 10, and then doesn't print correctly and I have no idea why. Please Help!

#pragma once
#include <stdio.h>
#include <cctype>      
#include <cstdlib>    
#include <iostream>    
#include <fstream>
#include <cstring>   
#include <string>
#include <sstream>
using namespace std;

//reads in the table prototype
void read_in_table(string line_input);

int main()
{
	string line_input;		//String for lines of text
	string path = "PeriodicTableElements.txt";//text file for elements
	ifstream input;//create stream
	input.open(path);//open stream
	if (input.fail())//run if fail to open file
	{
		cerr << "Could not open input file." << endl;
		system("PAUSE");
		exit(0);
	}
	while (input.peek() != EOF)//while file is open
	{
		getline(input, line_input, '\n');
		read_in_table(line_input);

	}
	input.close();//close stream




	cout << endl;//blank line
	system("PAUSE");
	return EXIT_SUCCESS;
}

//read in data to table
void read_in_table(string line_input)
{

	double weight;
	int i = 0;
	int j = 0;
	int k = 0;
	while (line_input[i] != ' ')
	{
		++i;
		if (line_input[i] = ' ')
		{
			j = i+1;
			k = j;
			while (line_input[k] != ' ')
			{
				k++;
			}
		}
	}
	int element_number = stoi(line_input.substr(0, i));
	string element = line_input.substr(j, k);
	int weight_length = line_input.size();
	string weight_string = line_input.substr(k, weight_length);
	istringstream convert(weight_string);
	if (!(convert >> weight))
		weight = 0;
	cout << "Element " << element << " " << "Weight " << weight << " " << "Number " << element_number << endl;
}

And here is the file:

>PeriodicTableElements.txt
(number, element, weight format)
1 H 1.008
2 He 4.0026
3 Li 6.94
4 Be 9.0122
5 B 10.81
6 C 12.011
7 N 14.007
8 O 15.999
9 F 18.998
10 Ne 20.180
11 Na 22.990
12 Mg 24.305
13 Al 26.982
14 Si 28.085
15 P 30.974
100 Fm 257.10
101 Md 258.10
102 No 259.10
103 Lr 262.11
104 Rf 265.12
105 Db 268.13

[Thomas1965]

Is there a reason for doing it so complicated ?
An easier way would be:

int number;
string element;
double weight_format;

// assumes input is valid
while(input >> number >> element >> weight_format)
{
  // use your vars
}

[recordedchaos]

Eventually I will be transferring the information to a hash table, I'm just verifying that it can be read in and parse correctly. The actual text file is much larger. The issue I seem to be having is correctly splitting the line into the components I need, could you explain "//use your vars"?

[Thomas1965]

could you explain "//use your vars"?

Well i depends what you want to do with them.
A good idea is first to print them to see if they are read properly.
cout << number << '\t' << element << '\t' << weight_format << '\n';

Eventually I will be transferring the information to a hash table

Might be a good idea to put them in a struct or class first and then use one of the set classes the STL provides - which uses a hashtable internally.

[recordedchaos]

At the moment, I am just ensuring that the lines are split correctly and printing that to test the split. Here is the read_in_table function as I currently have it to read data into the hash table:

//read in data to table
void read_in_table(table& hash_table, string line_input)
{
	
	double weight;
	int i = 0;
	int j = 0;
	int k = 0;
	while (line_input[i] != ' ')
	{
		++i;
		if (line_input[i] = ' ')
		{
			j = i;
			k = j++;
			while (line_input[k] != ' ')
			{
				k++;
			}
		}
	}
	int element_number = stoi (line_input.substr(0, i));
	string element = line_input.substr(j, k);
	int weight_length = line_input.size() - k;
	string weight_string = line_input.substr(k, weight_length);
	istringstream convert(weight_string);
	if (!(convert >> weight))
		weight = 0;
	hash_table.insert(element, weight, element_number);
}