am i doing this right?

[predude]

hi, i think i am stuck on a piece of code i am doing. i have a text file which i am reading from. i want to take out only the non zero values from the file and place it along with its coordinates in a vector.
the text file is separated into two sections based on a blank line between values. when i reach this blank line i want to start saving the remaining non zero values in another vector. i am using the two vectors to later do calculation so output is only in my code at the moment to see if i am going along correctly so far.
here's my code if anyone can help point out errors in my code it would be greatly appreciated.

#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <fstream>

using std::string;
using std::stringstream;
using std::cin;
using std::endl;
using std::cout;
using std::vector;
using std::ifstream;
using std::getline;


struct info {            
  int num;
  int co;
  int ro;
  
  };

vector<string> split(const string& line)
{


  std::vector<string> ret;
  stringstream ss(stringstream::in | stringstream::out);
  ss << line; 
  string x;
  while  ( ss >> x){
	  ret.push_back(x); 
  }
	  
	  
	
  return ret;
}

int main()
{
vector<info>matrix;
vector<info>matrix2;
info matri;
info matri2;
int count =0; int row2=0;
ifstream myfile("file.txt"); // open file
	if ( !myfile ) { // is file found and opened?
	cout << "Cannot find/open file" << endl;
	return 1;
	}

	string x; int row=0;

	while (getline(myfile,x)){
		if(x.empty()){
			break;
		}
	
		 //row++;
	
  std::vector<string> words = split(x);
  // print out the words obtained
  int count=0;
  for ( int i =0; i != words.size(); ++i ){
	  
	  int d;
//if(words[i] =="\n" ){
//break;	
//}

	  
	  d= atoi(words[i].c_str());
	  if(d!=0){
		 
		  ++count;
//myfile >> matri.sparse >> d >> i >> row;
		  d>>matri.num;
		  i>>matri.co;
		  row>>matri.ro;

		  matrix.push_back(matri);
//myfile.close;
for (int j = 0; j != count; ++j){
	//cout<<count;
	cout << "num:"<< d <<" col:"<< i<<" row:"<< row<< endl; //output all data
  } 

	}  
  }
  
cout<<"cols:"<<i<<"\n"<<"\n";
		
	++row;
  
	}
cout<<"\n"<<"rows:"<<row<<"\n";

ifstream myfile2("file.txt");
if ( !myfile2 ) { // is file found and opened?
	cout << "Cannot find/open file" << endl;
	return 1;
	}
string z; 

	while (!myfile2.eof()){
		getline(myfile2,z);

		while(!z.empty()){
			getline(myfile2,z);
		}

			 //row++;
while (!myfile2.eof()){
	getline(myfile2,z);
  std::vector<string> words = split(z);
  // print out the words obtained
  int count2=0;
  for ( int c =0; c != words.size(); ++c ){
	  
	  int b;
//if(words[i] =="\n" ){
//break;	
//}

	  
	  b= atoi(words[c].c_str());
	  if(b!=0){
		 
		  ++count;
//myfile >> matri.sparse >> d >> i >> row;

		  b>>matri2.num;
		  row2>>matri2.ro;
		  c>>matri2.co;

		  matrix2.push_back(matri2);
//myfile.close;
for (int k = 0; k != count2; ++k){
	//cout<<count;
	cout << "num2:"<< b <<" col2:"<< c<<" row2:"<< row2<< endl; //output all data
  } 

	}  
  }
  
cout<<"cols2:"<<c<<"\n"<<"\n";
		
	++row2;
	}
	
cout<<"\n"<<"rows2:"<<row2<<"\n";
	}
	if (row!=row2 )
	{
		cout<<"these things cannot be added !"<<endl;}
  return 0;
}