problem in the for loop :(

[Aqeel Abbas]

actually i am trying to break down a string of integers into an array of strings of 4 characters....but i am having problem in the loop that is why i can't do it.
"strs is a string array of size "next_line_count"which i declare and it is working fine."

  
  vector <string> myarray;
	string string_of_4_nos;
	char string_storage;
	string string_of_4;
	for(int j=0;j<next_line_count;j++)
	{
		for(int k=0;k<strs[j].size();k++)
		{
			for(int l=0;l<4;l++)
			{
				string_storage=strs[j].at(k);
				k++;
				string_of_4+=string_storage;
				
			}
			myarray.push_back(string_of_4);
		}
	}

	for(int j=0;j<myarray.size();j++)
		cout<<myarray[j]<<endl;

actually i am having problem in

string_storage=strs[j].at(k);
				

statement.

[agnophilo]

Giving the full code would help.

[Aqeel Abbas]

// project type 2.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <sstream>


using namespace std;

int main()
{
	ifstream myfile;
	string file_data;
	//vector <string> str;
	string *strs;
	int next_line_count=0;
	int i=0;							//used in string array indexing 
	myfile.open("lets have fun.txt");
	//if(myfile.is_open())
	{
		char a;
		while (!myfile.eof())
		{
			next_line_count++;
			
			myfile.get(a);
			while(a!='\n')
			{
				next_line_count++;
				myfile.get(a);
			}//cout<<"test1";
		}//cout<<"test2";
	}//cout<<"test3";
	strs=new string[next_line_count];
	myfile.close();
	myfile.open("lets have fun.txt");
	if(myfile.is_open())
	{
		
		while (myfile.good())
		{
			getline(myfile,file_data);
			//cout<<file_data;
			strs[i]=file_data;
			//cout<<strs[i];
			i++;
		}
			//strs=new string [next_line_count];
	}
	for(int j=0;j<next_line_count;j++)
		cout<<strs[j]<<endl;


	//***********************************************************************************************
	//dividing a string into chunks


	vector <string> myarray;
	string string_of_4_nos;
	//string myarr [100];
	char string_storage;
	string string_of_4;
	//int strarr=0;
	for(int j=0;j<next_line_count;j++)
	{
		for(int k=0;k<strs[j].size();k++)
		{
			for(int l=0;l<4;l++)
			{
				string_storage=strs[j].at(k);
				//k++;
				//string_of_4+=string_storage;
				
			}
			myarray.push_back(string_of_4);
		}
	}

	for(int j=0;j<myarray.size();j++)
		cout<<myarray[j]<<endl;





	system("pause ");
	return 0;
	
}