You could approach like this

Try looking into linked lists, they would appear more useful regarding the problem you described in your previous thread.

This is my code on which i m getting few problem my goal is to read an input file and create a graph out of it... Here i have indicated where i m facing problem pls help... Rather than understanding the complete code kindly help at the points where i got stuck

#include<iostream>
#include<vector>
#include<pending/stringtok.hpp>
#include<fstream>
#include<string>
#include<algorithm>
#include<ctype.h>
#include<boost/multi_array.hpp>
using namespace std;

int main()
{
string line;
string FileName="LL.csv";
ifstream myfile;
myfile.open("LL.csv");
static vector<string> vertex;
vector<string>edges;
int i;
if(!myfile)
{
cout<<"\nunable to open the file \n Either the file doesnot exist or bad format";
exit(0);
}

else
{
i=0;
while (! myfile.eof() )
{
cout<<"\nFile contents is :-";
getline(myfile,line);
cout <<line;
if(line=="")
break;
if(i==0)
{
boost::stringtok(vertex,line,",");
vertex.erase(vertex.begin());
cout<<"\nvertex set :-";
for(vector<string>::const_iterator itn=vertex.begin();itn<vertex.end();itn++)
{
cout<<(*itn);
}

}
int size =vertex.size();
// Now here i need to create a 2-D array
vector< <vector<string> > edge(size,size);
//In the above statement i m getting error i don't know the syntax to create a two dimensional array.


if(i>0)
{
int j=0;
vector<string>::iteator fir=edge.begin[0][j];
//Here in the above statement what i want is to get the position of first element of each row. say [0][0] or [1][0] Each time i iterate here j get incremented each time... Kindly let me know how should i do this.. This value im using in the following for loop..

for(index sec=0;sec<size;sec++)
{
boost::stringtok(edge[fir][sec],line,",");
}
bool p=true;
for(vector<string>const_iterator iter=vertex.begin();iter!=vertex.end();iter++)
{
if(edge[fir][0]==(*iter))
{
cout<<"Vertex is present in the set");
p=false;
break;
}
}
if(!p)
{
int second=0;
do
{
interator pos=find(edge[fir][second].begin(),A1[fir][second].end(),"1");
//In the above statement i m trying to find out if "1" is present in a particular row of a two dimensional array.. If yes it should return the position kindly let me know how to do this
if(pos!=A1[fir][second].end)
{
pair<>={edge[fir][second],vertex[pos]};
//Here i m trying to make pair between
between the vertex and the edge. How to do this

}
second++;
}while(pos!=A1.end);

else
{
cout<<"Vertex is not present invalid file format";
}

fir++;

}

i++;
}


myfile.close();
}

return 0;
}

Explain this in more detail using plain english. That would help us help you better. At the moment your code is unreadable and uses third party libraries most ppl wouldn't bother to download.