getline question

**Swaine777** · 03-17-2003

Hi,

I'm trying to write a program to help me look up Chinese characters in the dictionary. It's really hard on the eyes to use the book-dictionary and it takes forever. I'm a newb C++ programmer w/out even a book to help me, just trying to learn from online tutorials.

I'm wondering, when I use getline in the following piece of code, it reads from the text file the first line just fine but the next array is just garble. How do I move to the next line of the text file to read the next line into the next array?

Thanks a million for your help!

Code:

if (a_file.is_open()) 
    {
     a_file.getline(radindex1, 40);
     a_file.getline(radindex2, 40);
     a_file.getline(radindex3, 40);

Swaine777

**pelp** · 03-17-2003

With the code you have provided, you are just reading the first line and that is it. You need to expand your code to read the next line of the file such as a loop.

Below is an example of a program where it counts the number of names or lines contain in a text file. Let me know if you have any questions.

Code:

#include <iostream.h>
#include <fstream.h>
#include <string.h>
int main()
{
    ifstream file;
    char s[100]; 
    int count = 0;
    file.open("c:\\temp\\output.txt");

    file.getline(s,100); // ATTEMPT
    while (file) // CHECK IF SUCCESS
    {
        cout << s << endl;
        count++;
        file.getline(s,100); // ATTEMPT
    }
    cout << "There were " << count
        << " names" << endl;
    return 0;
}

**Swaine777** · 03-30-2003

Hi,

Here's the code I've been working on for my Chinese character look up program. Please remember I'm a rookie, teaching myself c++ :P I did get a book but it's too limited as far as getline() and multi-dimensional arrays. What's the best way to feed a multi-dimensional array with getline() reading a text/data file?

BTW, thanks Pelp for the help on reading data into a one-dim. array.

Code:

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

void FeedRadArray(int numrad_strokes);
void DisplayRads(int numrad_strokes);

using namespace std;

const int MaxRadsInRow = 51;

int main()

{

 int ns, 
     remaining_strokes, 
     rad_choice, 
     char_choice;

 cout<<"How many strokes are there in the radical? "<<endl;

 cin>>ns;

 FeedRadArray(ns);

 /*  send ns to a function that reads the radicals
     from the file into the radical array    */

 cout<<endl<<"Please choose from the following radicals:"<<endl;

 cin>>rad_choice;

 // cout<<"You chose "<<y<<". "<<radindex??[y]<<endl;  

 cout<<"How many strokes are there in the rest of the character? "<<endl;

 cin>>remaining_strokes;

 // DisplayHanzi(rad_choice, remaining strokes);

 /* Send rad_choice and remaining_strokes to a function that displays the radical and
    the characters under that radical with that many remaining strokes */

 cout<<"Which of the following is the character you're looking for? ";

 cin>>char_choice;

 // LookUpChar(choose_char);

 return 0;

}

void FeedRadArray(int numrad_strokes)

{
  char radindex[12][MaxRadsInRow];
  ifstream a_file("c:\\Downloads\\C_Source\radicals3.txt");     //opens the file for reading
  a_file.getline(radindex, MaxRadsInRow);
  while (a_file)
  {
    a_file.getline(radindex, MaxRadsInRow);
  }  
  DisplayRads(numrad_strokes);
  cout<<endl; 
  a_file.close();  //don't forget this!     
}

void DisplayRads(int numrad_strokes)

{
  int x = numrad_strokes - 1;  //PREPARES numrad_strokes FOR USE IN ARRAY
  for(int y=0; y<=MaxRadsInRow; y++)
    {
      if (y % 2 != 0)
        cout<<y+1<<". "<<radindex[x][y];
        else
          cout<<"     "<<y+1<<". "<<radindex[x][y];
    }
}

Thanks for any tips/suggestions you can throw my way.

Thread: getline question

Thread Tools

Search Thread

Display

getline question

Feed a multi-dim. array with getline

Similar Threads

Question About Getline

another do while question

A question about getline

opengl DC question

getline question