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reading from a text file: not line by line but values seperated by a space

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reading from a text file: not line by line but values seperated by a space

May 25th, 2009

all i can do is get each line at a time....
how can i read it to only read till the space....

plz help.... heres my lil bit of code

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
 while (getline(iofile,line))
  {
   cout << line << endl; 
  }
 while (getline(iofile,line))
  {
   cout << line << endl; 
  }

plz i know i can use this aswell for line by line

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
 while (!iofile.fail())
  {
    getline(iofile,line)
    cout << line << endl; 
  }
 while (!iofile.fail())
  {
    getline(iofile,line)
    cout << line << endl; 
  }

thanx in advanced

Last edited by phoenix911; May 25th, 2009 at 7:41 am.

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amrith92

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Re: reading from a text file: not line by line but values seperated by a space

May 25th, 2009

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
while (getline(iofile,line))
{
   cout << line << endl; 
}
while (getline(iofile,line))
{
   cout << line << endl; 
}

Your code is on the right track. Check out the getline function's prototypes here: getline - C++ Reference. The file structure you have described is known as a "Space-delimited File". In your getline function, specify the delim parameter. (If you have followed the link, you will know what to pass as this third parameter).

Hope this helps!

NOTE: This type of question has been asked many times before, in fact some very visible in the main Index of this forum! Try to at least search these forums/or the web before posting your question. A LOT of information is available on the net on this topic.

Last edited by amrith92; May 25th, 2009 at 7:52 am.

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Re: reading from a text file: not line by line but values seperated by a space

May 25th, 2009

thanx...will check it out right away...

but b4 i do... im using something like this now

Help with Code Tags

C++ Syntax (Toggle Plain Text)

iofile >> data1 >> data2 >> data3 >> data4;

will this help???

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amrith92

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Re: reading from a text file: not line by line but values seperated by a space

May 25th, 2009

•

Originally Posted by phoenix911

thanx...will check it out right away...

but b4 i do... im using something like this now
Help with Code Tags

C++ Syntax (Toggle Plain Text)
iofile >> data1 >> data2 >> data3 >> data4;
iofile >> data1 >> data2 >> data3 >> data4;
will this help???

I have no idea where you are going to put this, so I don't know what it will accomplish. If it is inside your while-loop, then, no it will not help at all. Anyway, this approach undermines the purpose of getline in the first place. Stick with your original code.

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Re: reading from a text file: not line by line but values seperated by a space

May 25th, 2009

so far i got this

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
 
fighter fight[80]; // this is a class with an array size
 
//the class looks as follows
class fighter
 { 
  string name, special; 
  int str, agi, spd;  
 
public: 
 
 
  void set(string n, string s, int st, int ag, int sp)
   {
   name = n;
   special = s;
   str = st;
   agi = ag;
   spd = sp;
   } 
// end of class
 
 while (getline(iofile,line))
  {
   iofile >> name >> special >> str >> agi >> spd;
 
   fight[n].set(name, special, str, agi, spd);
n++;
  }
fighter fight[80]; // this is a class with an array size

//the class looks as follows
class fighter
 { 
  string name, special; 
  int str, agi, spd;  
  
public: 


  void set(string n, string s, int st, int ag, int sp)
   {
   name = n;
   special = s;
   str = st;
   agi = ag;
   spd = sp;
   } 
// end of class

 while (getline(iofile,line))
  {
   iofile >> name >> special >> str >> agi >> spd;

   fight[n].set(name, special, str, agi, spd);
n++;
  }

now is what im trying to do right? read from the text file and put it into an array?

Last edited by phoenix911; May 25th, 2009 at 8:10 am.

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ArkM

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Re: reading from a text file: not line by line but values seperated by a space

May 25th, 2009

Line by line, word by word:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
void WordByWord(const char* filename)
{
    if (!filename)
        return;
    ifstream file(filename);
    string line, word;
    for (int lineno = 1; getline(file,line); lineno++) {
        cout << "Line #" << lineno << ":\n";
        istringstream words(line);
        while (words >> word)
            cout << word << '\n';
    }
}
void WordByWord(const char* filename)
{
    if (!filename)
        return;
    ifstream file(filename);
    string line, word;
    for (int lineno = 1; getline(file,line); lineno++) {
        cout << "Line #" << lineno << ":\n";
        istringstream words(line);
        while (words >> word)
            cout << word << '\n';
    }
}

Think

...

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amrith92

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Re: reading from a text file: not line by line but values seperated by a space

May 25th, 2009

Did you actually go through the links I gave, and the clue I provided in my previous posts? If so, did you not understand it? and no, your code still will read your file line-by-line.

> read from the text file and put it into an array?

A similar(if not exactly the same) question has been asked at least twice in the past week in this same forum. Search for answers first, and iff you did not understand it, or else your problem hasn't been addressed to yet, then ask the question.

> (To ArkM): Nice Code!

Last edited by amrith92; May 25th, 2009 at 8:19 am.

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Re: reading from a text file: not line by line but values seperated by a space

May 25th, 2009

yes i did read ur post... and actually what i posted is working talking bout the

Help with Code Tags

C++ Syntax (Toggle Plain Text)

iofile >> data1 >> data2 >> data3 >> data4;

it actually does what i want...

only prob i have now is storing it in2 an class array :/

Last edited by phoenix911; May 25th, 2009 at 8:22 am.

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Re: reading from a text file: not line by line but values seperated by a space

May 25th, 2009

>>only prob i have now is storing it in2 an class array

What array? You need to post the exact class declaration instead of making us guess what you are doing.

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Re: reading from a text file: not line by line but values seperated by a space

#10

May 25th, 2009

heres my entire class

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
class fighter
 { 
  string name, special;  // when i compile it says error is here
  int str, agi, spd;  
 
public: 
 
  void set(string n, string s, int st, int ag, int sp)
   {
   name = n;
   special = s;
   str = st;
   agi = ag;
   spd = sp;
   } 
 };
class fighter
 { 
  string name, special;  // when i compile it says error is here
  int str, agi, spd;  
  
public: 

  void set(string n, string s, int st, int ag, int sp)
   {
   name = n;
   special = s;
   str = st;
   agi = ag;
   spd = sp;
   } 
 };

what im trying to do here... is display the class array

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
for (n = 0; n < 80; n++)
  {
  cout << fight[n].name << endl; // and this is part of the error
  }
for (n = 0; n < 80; n++)
  {
  cout << fight[n].name << endl; // and this is part of the error
  }