basic i/o question cout<<str;

How can I modify the below text so that it couts all of example.txt?

If you want to answer another question:

1. How can I declare a string, for example
int a=0;
char a[256]=test; ((??))



[code]

#include <iomanip.h>
#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
#include <conio.h>
#include <time.h>
#include <ctype.h>


int main()

{

char str[10];

//Used later

ofstream a_file("example.txt");

//Creates an instance of ofstream, and opens example.txt

a_file<<"This text will now be inside of example.txt";

//Outputs to example.txt through a_file

a_file.close();

//Closes up the file

ifstream b_file("example.txt");

//Opens for reading the file

b_file>>str;

//Reads one string from the file

cout<<str;
cout<<str;
cout<<str;
cout<<str;
cout<<str;
cout<<str;
cout<<str;
cout<<str;

//Should output 'this'

b_file.close();

//Do not forget this!
getch();

}

[c/ode]

Use getline.

source.getline(placetooutputto,maxnumberofchars,en dingchar);

so you might use b_file.getline(str,100,'/n');

But of course you would want to put a /n at the end of the string. or any other character you choose. It will keep going until it finds that character. I'm not sure whether an error will come up or not if you get to the end of a file.

If you mean displaying all of a file on cout:

Code:

---

#include <iostream>
#include <fstream>

int main (void)
{
        std::ifstream in ("example.txt");
        char buf[256];

        while (!in.eof())
        {
                in.getline(buf,256,'\n');
                std::cout << buf << std::endl;
        }

        return (0);
}

---

Now I have the below, which compiles, but crashes when i try to run it.

Code:

---


#include <iomanip.h>
#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
#include <conio.h>
#include <time.h>
#include <ctype.h>


int main()

{

  char str[10]; 

        //Used later

  ofstream a_file("example.txt");

                        //Creates an instance of ofstream, and opens example.txt

  a_file<<"This text will now be inside of example.txt/n";

                        //Outputs to example.txt through a_file

  a_file.close();

                        //Closes up the file

  ifstream b_file("example.txt");

                        //Opens for reading the file

 b_file.getline(str,100,'/n');


            //Reads one string from the file


  cout<<str;
  cout<<str;
  cout<<str;
  cout<<str;
  cout<<str;
  cout<<str;
  cout<<str;
  cout<<str;

          //Should output 'this'

  b_file.close();

          //Do not forget this!
  getch();

}

---

Because you declared str has being a 10 character array, but are trying to read 100 characters into it.

Also, you're printing the same thing a bunch of times with all those couts, not reading from the file, if that's what you're trying to do...

Nor does this work.

Code:

---

#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
#include <conio.h>
#include <time.h>
#include <ctype.h>


int main()

{
  char str[100];
  ofstream a_file("example.txt");
  a_file<<"This text will now be inside of example.txt/n";
  a_file.close();
  ifstream b_file("example.txt");
 b_file.getline(str,100,'/n');
  b_file.close();
  getch();

}

---

The carriage return is "\n" not "/n".

Also, does not work as in crashes, or does not work as in what you want it to do? The code I posted should work.

does not work as in freezes up and does not respond

This works fine on my computer :

Code:

---

#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
#include <conio.h>


int main()
{

        char str[100];
        ofstream a_file("example.txt");
        a_file<<"This text will now be inside of example.txt\n";
        a_file.close();
        ifstream b_file("example.txt");
        b_file.getline(str,100,'\n');
        cout << str << endl;
        b_file.close();
        getch();
        return 0;
}

---

ah, thanks