file reading

**condorx** · 12-29-2002

i have a file data.txt
and i want to read the data form the file and write them to screen

file data is :
1 2 3 ;

Code:

int i,j=0,dat[256];
ifstream fin;
char *line,*data;

fin.open("data.dat");
fin.getline(line,256);

while(fin)
{
      i  = 0;       
     while(line[i] != ' ; ')
     {
             k = 0;            
             while(line[i] != ' ')     //while the char is not  space ex: 10 5 4;
              {
                    data[k] = line[i];     
               }    
                k = 0;
                dat[k] = atoi(data); //is that true??
      }
}

}

**matheo917** · 12-29-2002

all this stuff is redundant and useless for you...

if your class looks like this:

1 2 3 ;

then do this and you're don:

Code:

#include<fstream>
#include<iostream>
#include<cstdlib>
using namespace std;

int main()
{
    ifstream fin("data.txt");
    char temp;

    if(fin.fail())
   {
         cout << "Can't open file for input!!! \n";
         exit(1);
    }


    else
    {
         fin.get(temp);

         while(temp != ';')
         {
               cout << temp << endl;
               fin.get(temp);
          }
     }

    return 0;
}

since (like you said) you only want to read a character from the file and display it on the screen this would be sufficient for you...

matheo917

**The Wiep** · 12-29-2002

This is a small one (am a newbie

) reading every character from a textfile and displaying it on the screen.
Not sure if this is what you are looking for but it might help.

Code:

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

void main()


{
	fstream bestand;
	char letter;
	bestand.open ("c:\\data.txt",ios::in);
	while(!bestand.eof())
	{
		bestand.get(letter);
		cout<<letter;
	}
	bestand.close();
}

ooops, forgot the code tag sorry

**Prelude** · 12-29-2002

>void main()
main only returns int, anything else is wrong and undefined.

>bestand.open ("c:\\data.txt",ios::in);
Be sure to check that this succeeded.

>while(!bestand.eof())
This is the wrong way to use eof(), it's better to use the input call as a loop condition since they tend to return correct boolean values:

Code:

while ( bestand.get ( letter ) )

Code:

#include <iostream>
#include <fstream>

int main()
{
  char c;
  std::ifstream in ( "c:\\data.txt" );
  
  if ( in.is_open() ) {
    while ( in.get ( c ) )
      std::cout<< c <<std::flush;
    
    in.close();
  }
}

-Prelude

**The Wiep** · 12-29-2002

Thanks for the correction.

Thread: file reading

Thread Tools

Search Thread

Display

file reading

Similar Threads

opening empty file causes access violation

Formatting the contents of a text file

airport Log program using 3D linked List : problem reading from file

Possible circular definition with singleton objects

System