Need some help with some basics

[kavourdoukos]

I would like to open from a file and then store the strings stored in the txt filed to an array.The txt file i want to open has 1 string on each line.So each line will be 1 string.What should i change here?

// reading a text file
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main () {
  string line;
  ifstream myfile ("example.txt");
  if (myfile.is_open())
  {
    while (! myfile.eof() )
    {
      getline (myfile,line);
      cout << line << endl;
    }
    myfile.close();
  }

  else cout << "Unable to open file"; 
getchar();
  return 0;
}

[twomers]

Before the reading look do a std::vector<std::string> fileContents. Then when you do each line do a fileContents. push_back( line ); Also. You can just do a while( getline(fileStream,line) ) { /*...*/ } instead of the .eof that you did.

[kavourdoukos]

I am a starter....Can u show me in code how to achieve this?Thx in advance.Btw i dont know sth about "vector".

[twomers]

// reading a text file
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;

int main () {
  string line;
  vector<string> file;
  ifstream myfile ("example.txt");
  if (myfile.is_open())
  {
    while (getline(myfile,line) )
    {
      file.push_back( line );
      cout << line << endl;
    }
    myfile.close();
  }

  else cout << "Unable to open file"; 
  // Can print out: file[3], etc. To get th enumber of lines use file.size()
getchar();
  return 0;
}

[twomers]

// reading a text file
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;

int main () {
  string line;
  vector<string> file;
  ifstream myfile ("example.txt");
  if (myfile.is_open())
  {
    while (getline(myfile,line) )
    {
      file.push_back( line );
      cout << line << endl;
    }
    myfile.close();
  }

  else cout << "Unable to open file"; 
  // Can print out: file[3], etc. To get th enumber of lines use file.size()
getchar();
  return 0;
}

I put the added lines in red.

edit: Whoops. Clearly I double posted. I meant to edit. but I hit reply.

[kavourdoukos]

And my array now is file[] which has file.size number of lines?

[twomers]

If you want an array you need knowledge of the number of lines in the file. The benefit of vectors is that you don't need knowledge, a priori (sp?), of the number of lines in the file. You can just add.

Otherwise you could just create a large array and add elements to that array...

sttring file[numLines];
int i(0);

while ( getline(file,line) )
  file[i++] = line;

Something like that.

[kavourdoukos]

Where can i read about teh functions above?I searched over the net but didnt find any explanatory guide...