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I am having trouble deleting a string from a list. My program has to read strings from a file, then I have to delete the ones that are equal. I am a little bit lost. Any suggestions would be appreciated.

#include <iostream>
#include <fstream>
#include <string>

using namespace std;


struct node {
    string one;
    node *next;
};

node *start_ptr = NULL;
node *current;
int option = 0;

void add_node_at_end( ifstream& infile )
  {  
     node *temp, *temp2;   
     
     
     temp = new node;
    

	 while ( !infile.eof() )
	 { 
     infile >> temp->one;
     temp->next = NULL;
	 cout << " " << temp->one << endl;
	 }


     if (start_ptr == NULL)
     {
	 start_ptr = temp;
	 current = start_ptr;
     }

     else
     { 

     temp2 = start_ptr;
         
     while  ( temp2->next != NULL )
     { 
			   
     temp2 = temp2->next;
               
     }

     temp2->next = temp;
  }
	 
}
	

int main(){
	
	start_ptr = NULL;

        ifstream infile;
	ofstream outfile;

	infile.open ( "j:\\List.txt" );
	if ( !infile )
	{
	cout << "Input file (List.txt) does not exit." << endl;
	system ("pause");
	return 1;
	}
        outfile.open ( "j:\\noDuplicates.txt" );
	cout << "Processing data" << endl;
   
	
	add_node_at_end( infile ); 
	
        infile.close();
	system ("pause");
        return 0;
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