Thread: read lines

Use a counter and the getline function.

>but you could just scan the file and count the number of newline characters occurring.
This screams fencepost error. What if the last line is terminated with end-of-file instead than a newline? Your count would be off by one.

>the file only contains binary inputs
When you want to count the lines in a file, it's usually expected that the file contains text. This is mostly because newlines vary depending on the system, and any attempt to read one in a binary oriented file could easily fail. Maybe you should give us an example of the file, describe what you mean by a "line", and explain what you intend to do with the count. Then we'll be in a better position to offer suggestions beyond the usual suspects.

So is it binary or text? That's kind of an issue in determining a solution. If it's text, you can just loop with getline:

Code:

while ( getline ( in, line ) ) {
  // Increment a count, store the line, whatever
}

>its more like
Okay, that's text which just happens to represent binary values. So you can approach the problem from that perspective and use getline.

At this point you need to post your code, or we'll be completely unable to help you (or refuse to).

I apologize heres what my code looks like

Code:

#include "stdafx.h"
#include <fstream>
#include <iostream>
using namespace std;

int main()
{
   
      char str[20];
        fstream file_op("c:\\andop.txt",ios::in);
        while(file_op >> str)
        cout << " \n" << str << endl;

	
        file_op.close();

		ofstream file_wr("c:\\outfile.txt", ios::out);
		  file_wr.close();

        return 0;

}

the andop(and operator) only contains a four line matrix