Solved

Checking a specific part of a text file (CSV comma delimited) using tokenizer

Posted on 2011-02-21
5
419 Views
Last Modified: 2012-08-13
This is my code for my double loop...

char str[1024];
char *pch;
FILE *fp;
int first;

fp=fopen("abc.txt", "r");

if(fp != NULL)
while(fgets(str, sizeof(str), fp) != NULL)
{
first=1;
while((pch=strtok(first ? str: NULL, ",")) != NULL)
/*---Here is where I want to insert my line of code---*/
first=0;
}
}

Open in new window


The contents of my text file look similar to this

10/03/2010,NBC,Law&Order
10/02/2010,NBC,Chuck
10/01/2010,NBC,TheEvent
09/29/10,CBS,TheBigBangTheory
09/28/10,CBS,TwoAndAHalfMen
09/27/10,TBS,Conan

At this point, I'm only interested in the second column of the data (the network).
Is there a line that I can insert that will ... If(network=valueA) then perform action A,
Else If (network = valueB) Then perform action B?

Thanks
0
Comment
Question by:--TripWire--
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 50 total points
ID: 34943959
Well, just count the columns that you are processing, i.e.
char str[1024];
char *pch;
FILE *fp;
int first;
int column = 0;

fp=fopen("abc.txt", "r");

if(fp != NULL)
while(fgets(str, sizeof(str), fp) != NULL)
{
first=1;
while((pch=strtok(first ? str: NULL, ",")) != NULL)
/*---Here is where I want to insert my line of code---*/
column++;

  if (column == 2)
  {
    if (!strcmp(pch,"NBC"))
    {
      // process "NBC"
    }

    if (!strcmp(pch,"ABC"))
    {
      // process "ABC"
    }

    if (!strcmp(pch,"CBS"))
    {
      // process "CBS"
    }

    // ,,,
  }

first=0;
}
}

Open in new window

0
 

Author Comment

by:--TripWire--
ID: 34944040
I've decided to use strcpy to place that value into different variable instead.
If I have
char network[3];

Open in new window

How do I strcpy that value in the string variable network?
0
 
LVL 86

Expert Comment

by:jkr
ID: 34944060
The same way - yet your buffer is too small, you need to include the NULL terminator.
0
 

Author Comment

by:--TripWire--
ID: 34944123
Oh ok thanks.  Only, I coded a puts() line after my strcpy (just to check my values) and it's returning the date.

I initialized column to 1 and then column++;
0
 

Author Comment

by:--TripWire--
ID: 34944138
Nevermind...answered my own question!  Thanks again!
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
C qsort compare function issue 6 70
Can Live bindings change TGrid Cell Colour ? 1 64
parameter pack in c++11 2 23
C++ statement T∗ begin(Vector<T>& x) 5 45
When writing generic code, using template meta-programming techniques, it is sometimes useful to know if a type is convertible to another type. A good example of when this might be is if you are writing diagnostic instrumentation for code to generat…
Introduction This article is a continuation of the C/C++ Visual Studio Express debugger series. Part 1 provided a quick start guide in using the debugger. Part 2 focused on additional topics in breakpoints. As your assignments become a little more …
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question