read and store varible from text file

[yardygenius]

Hello, i am trying to read the contents of a txt file that will store a variable. this txt file will only contain one or string number. so far i have gotten the program to store numeric values but i am unable to store a string.

the below code reads from a txt file which only has the number "100" in the first line. it stores 100 into the variable x.

#include <iostream.h>
#include <conio.h>
#include <string>
#include <fstream.h>
 void main()
 {
  ifstream input;
  input.open("temp/hex.txt",ios::in);
  int n,x;
 while(!input.eof())

  {input>>n;

  }

  x=n;
  cout<<x;
  getch();
 }

i have edited the above code to save the name"John" in variable x. but it does not work. i really need the program to read and save hex values such as 3E8. I am using string incorrectly. any help offered would be appreciated.

#include <iostream.h>
#include <conio.h>
#include <string>
#include <fstream.h>
 void main()
 {
  ifstream input;
  input.open("temp/hex.txt",ios::in);
  string n,x;
 while(!input.eof())

  {input>>n;

  }

  x=n;
  cout<<n;
  getch();
 }

[jlillie89]

#include <iostream>// changed .h
#include <conio.h>
#include <string>
#include <fstream> same thing here
using namespace std; //included 
void main()
 {
  ifstream fin; // I call it fin just preference
  fin.open("myfile.txt",ios::in);
  string n,x;
 while(!fin.eof())

  fin >> n;

  

  x = n;
  cout << n;
  getch();
 }

I got it to work on mine. I used call it fin instead of input I added using namespace std;

[yardygenius]

thanks for you reply, but i tried running the program but it still does not work. i am using borlan c++. I am not allowed to use another compiler.. can you think of anything else that may be causing the problem.

[jlillie89]

Does it compile? If not what errors do you get? I'm not at all framilar will borlan. I can't see anything by looking at it. Sorry sir. Maybe if you get errors we can try and figure it out.

Edit: what is this string n,x;

I write it like this string n = ""; Or I write string n; I don't know maybe that is not what is the problem like I said I'm unfamiliar with what you are using.

Nevermind its the same.. Yeah I'm not sure dude.

[yardygenius]

Anyone else has any idea how I can get this working?

[Chervil]

I'm puzzled as to why you use a while() loop to read a single value.

But that aside, are you sure that the file is actually opened correctly?
After the open() statement, you could check good() or is_open() to verify that the file was successfully opened. Use a cout message to show the status.

[jlillie89]

Hi dude I tried to look again for you ...I noticed that

#include <iostream.h>
#include <conio.h>
#include <string>
#include <fstream.h>
 void main()
 {
  ifstream input;
  input.open("temp/hex.txt",ios::in);
  string n,x;
 while(!input.eof())

  {input>>n;

  }

  x=n;   // you assign n to x
  cout<<n;  // you cout n...did you mean x? Or am I mistaken?
  getch();
 }

Also you don't really need to assign it it anything if you input n just cout << n you don't have to assign it to another variable.
Maybe it will help or maybe I'm wrong take it with a grain of salt I tried.