Reading files word by word

[JWest46088]

I can't figure out how to read a file word by word. I want to open the file and then read it one word at a time. For example, I'm looking for words that start with d. How would I scan each word of the file to see if it starts with the letter d?

[gpraghuram]

I can't figure out how to read a file word by word. I want to open the file and then read it one word at a time. For example, I'm looking for words that start with d. How would I scan each word of the file to see if it starts with the letter d?

After reading the word check whether the position 0 of the string contains d .
If it is then its the word you are lokking for or else skip it.
[code=c]
char arr[] = "defghi";
if(arr[0] == 'd')
{
/*This word starts with d*/
}
else
{
/*skip it*/
}
[/code]

Raghuram

[JWest46088]

After reading the word check whether the position 0 of the string contains d .
If it is then its the word you are lokking for or else skip it.
[code=c]
char arr[] = "defghi";
if(arr[0] == 'd')
{
/*This word starts with d*/
}
else
{
/*skip it*/
}
[/code]

Raghuram

How would I get the word though? I don't know how to get one word at a time. I only know how to use getline a little bit.

Here's the code I have:

                if(myfile.is_open())
                {
                        while(! myfile.eof())
                        {
                                myfile >> word;
                                cout << word << endl;
//                              getline(myfile, word);
//                              cout << word  << endl;
//                              getline(myfile,line);
//                              cout << line << endl;
                        }
                        myfile.close();
                }
        }

        return 0;
}

It reads the file and outputs one word on a new line, like this:

hello.
my
name
is
joe.

[weaknessforcats]

if(myfile.is_op en())
{
while(! myfile.eof())
{
myfile >> word;
cout << word << endl;
// getline(myfile, word);
// cout << word << endl;
// getline(myfile, line);
// cout << line << endl;
}
myfile.close();
}
}

return 0;
}


It reads the file and outputs one word on a new line, like this:

hello.
my
name
is
joe.

I'm sorry, but you are reading the file word by word. Just do what it says in Post #2.

[JWest46088]

I wrote more code. I added two linked lists I need and tried to open the file, read a word at a time, and insert it into the linked list. I don't think I did it right though. When I run the program, it asks the user to input a filename like it's supposed to and accepts the response, but after that, nothing happens. The program just keeps running without doing anything. Feedback of what I did wrong and what I have to do to fix it would be appreciated. Thanks.

Here's my new code:

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

struct dlist
{
	char dword[30];		//holds a word up to 30 characters
	int dcount;		//number of times a word appears
	dlist *dnext;		//pointer to next node
};

struct anylist
{
	char anyword[30];
	int anycount;
	anylist *anynext;
};

dlist *dhead = NULL;
dlist *dpos;
anylist *anyhead = NULL;
anylist *anypos;

void insert();
void display();

int main()
{
	dhead = NULL;
	anyhead = NULL;
	insert();
	display();

	cout << "test";

	return 0;
}

void insert()
{
//	head = NULL;
	dlist *dtemp, *dtemp2;
	anylist *anytemp, *anytemp2;
	string file, word;
	
	dtemp = new dlist;
	anytemp = new anylist;

	cout << "\nEnter a file to scan: ";
	cin >> file;

	if(file != "dtext.txt")

		cerr << "\nInvalid file.\n" << endl;

	ifstream myfile("dtext.txt");

	while(file == "dtext.txt")
	{
		if(myfile.is_open())
		{
		cout << "file open test";
			while(! myfile.eof())
			{
				myfile >> word;
				
				if(word[0] == 'd')
				{
//					cout << word << endl;
					dtemp->dword;
//					dcount++;
					dtemp->dnext = NULL;
				}
				else
				{
					anytemp->anyword;
//					anycount++;
					anytemp->anynext = NULL;
				}

				if(dhead == NULL)
				{
					dhead = dtemp;
					dpos = dhead;
				}
				else
				{
					dtemp2 = dhead;

					while(dtemp2->dnext != NULL)
						dtemp2 = dtemp2->dnext;
					dtemp2->dnext = dtemp;
				}
			myfile.close();
			}
		}
	}

	return;
}

void display()
{
	dlist *dtemp;
	anylist *anytemp;

	dtemp = dhead;
	anytemp = anyhead;

	if(dtemp == NULL)
		cout << "The list is empty!" << endl;
	else
	{
		while(dtemp != NULL)
		{
			cout << "D List: " << dtemp->dword << endl;

			dtemp = dtemp->dnext;
		}
	}
	
	if(anytemp == NULL)
		cout << "The any list is empty" << endl;
	else
	{
		while(anytemp != NULL)
		{
			cout << "Any List: " << anytemp->anyword << endl;
			
			anytemp = anytemp->anynext;
		}
	}
}

[gpraghuram]

What is the use of this line

[code=cpp]
while(file == "dtext.txt" )
[/code]
This will loop continuously.
Change to if loop or else remove it.


Raghuram