Thread: Question about IOStream and reading strings from files

Code:

char foo[50];
   
fgets(foo, 50, stdin);
   
printf("Your string was %s", foo);

If you want to find a string in a file, you could transverse through the file until you find what you're looking for. Just use a loop.

fstream is C++

and it's alot easier to find a string.

Code:

ifstream inFile;
string foo;

inFile.open("file.txt");

do {
   getline(inFile, foo, '\n');
   } while (foo != "The string I want") // Or whatever you want. You might have to mess 
               // with the delimeter to get the string you want.

I don't know if C has a way to get a string up to a delimeter other than reading one character at a time. THere might be, but I don't know C that well.

Code:

char blah;
string foo, string1;

do {
   inFile.get(blah);
   } while (blah != 'a');

string1 = blah;

getline(inFile, foo, '\n');

string1 += foo;

Paste your code.

well I thought it was working but I geuss not when I ran another test.

Code:

string test,name;

name = "BallSpin";

do {
   getline(fin,test);
   cout<<test<<endl;
   system("PAUSE");
   } while (test != name);

Should this not end when it comes to string BallSpin?

also in my text file it is "AnimName BallSpin" so i might have to include the whole line instead of just the Key word "BallSpin"

It should exit the loop when your string says BallSpin, but I noticed you didn't put a delimeter on your getline function. That would by default make getline read until the first \n. Unless your file is simply "BallSpin" it wouldn't work.

Code:

getline(fin,test,' ');

getline's delimiter defaults to the newline.

Yeah, I just checked and noticed that. In any event, he more than likely wants a space as the delimeter.

well when I use getline(fin,test,' '); it does not exit

but when I include the whole line and use
getline(fin,test); it will exit now. I can work with that.

so when it exits how do i pickup after were I left off at with out including were it left off? I need there very next line.

edit:
I even tryed '\n' and it still did not work.

Code:

#include <cstdlib>
#include <iostream>
#include <fstream>

using namespace std;


 
 string foo, string1;

string test,name,name2,name3;
//BallSpin



int main(int argc, char *argv[])
{   name2 = "AnimName ";
    name = "BallSpin";
   name3 = name2 + name;
   fstream fin("image1.txt");


do {
   getline(fin,test,'\n');
   cout<<test<<endl;
   } while (test != name3);

    system("PAUSE");
    return EXIT_SUCCESS;
}

Code:

AnimName BallExplode
File 1.bmp 
Left 1
Right 1
Top 1
Bottom 1 
Red 1
Green 1
Blue 1
Delay 1
Width 1
FrameW 1
;
AnimName BallSpin
File null.bmp 
Left 0
Right 92
#Top 0
Bottom 0 
Red 0
Green 0
Blue 0
Delay 0
Width 0
FrameW 0
;

Ok, first off you're not declaring your variables. Secondly you declared an fstream, you should declare ifstream.

The reason why '\n' or space doesn't work in this file is because if the delimeter was a newline character it'd read in "AnimName BallSpin" if it was a space, it'd read in "Ballspin\nFile"

What you could do is either put a space after each word before you start a new line or you could resize your string after you read in a word so that it would only fit "BallSpin" and nothing more. There are probably numerous other ways to handle this.