Manipluating with a file!

fsatafi (1)
Hi all,

I have one problem with reading a textfile. My first solution was:
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#include <iostream>
#include <string> 
#include <fstream>

using namespace std;
  
struct Student 
   {
      int no;
      int id;
      string city;
	  float points;
	  int grade;
      Student *next; 
   };
int main()
{
    int seq_num, Id, gr;
    float pn;
    string ct;

    ifstream infile;
    infile.open("d:\\dataset.txt");
   
	Student *head=NULL; 
   
	while (infile)
    {
        infile>>seq_num>>Id>>ct>>pn>>gr; 
										      
      
        Student *newStudent; 
	    newStudent = new Student; 
        newStudent->no = seq_num; 
        newStudent->id = Id;
        newStudent->city = ct;
        newStudent->points = pn;
        newStudent->grade = gr;
        newStudent->next = NULL;
       
        if (head ==NULL) 
            head = newStudent; 
        else
        {
            newStudent->next = head; 
            head = newStudent; 
        }                   
    } 
		
	cout<<"\nNo\tID\tCity\tPoints\tGrades ";
	cout<<"\n\n";

	Student *Display_ptr; 
	Display_ptr = head; 

	while (Display_ptr)
	{
		  cout<<Display_ptr->no<<"\t"
			  <<Display_ptr->id <<"\t"
			  <<Display_ptr->city<<"\t"
			  <<Display_ptr->points<<"\t"
			  <<Display_ptr->grade<<"\t"
			  <<endl;
		Display_ptr = Display_ptr->next; 

	}

	infile.close();
return 0;

}

This code is good and it works. As you can see I need to store each column in different type which is appropriate for it. But now my problem is taht I have another text file, and like this I need to store it but the problem is that in this text file each column is separated with tab, but the length of third column is larger than others. I try to read it with getline() and giving a delimiter but I did'nt succed. I want from to tell me how to use the getline() example:
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while(textfile_name)
{
cin.getline(column, textfile_name, "\t");
}


I will give you one example of one record from textfile as follows:

15366 4/15/2003 1 HP JORNADA 560 SERIES POCKET PC COLOR 262 2


But with this code I get an errors. Can someone give a suggestions??

Thank you very much.

Last edited on
firedraco (6247)
Actually...the code is very bad...you have a HUGE memory leak, because you are not freeing any of the memory you are allocating with new.

Anyway, what exactly was the error you got?
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