Counting lines between words for multiple data sets

[question3099]

Hi everyone,
I know there have been slightly similar posts for counting the number of lines between specific words, but none of them were quite what I'm looking for.

I have a .txt file with all my data, and I've set it up so it looks something like this:

Line
 (data)
 (data)
 (data)
End
Line
 (data)
 (data)
End

and etc. So what I've been struggling to find is a way to count the number of lines in between 'Line' and 'End' for each set. I of course do not want to do this by hand as there are 1000 data sets. There are also some data sets that are empty, and so would appear like:

Line
End

Is there a way to do this?

[Intrexa]

question3099 wrote:

Is there a way to do this?

Of course.

Open the file, while(has next line) read line, if it's Line, start new count, if it's end, display count, otherwise count++, read everything between the newline character as a line, so

Line\n
 data\n
 data\n
End\n

read everything into a buffer until you reach the newline character, then check to see if that buffer is either line or end.

If you need help with any individual step, let us know.

[question3099]

Thanks, Intrexa,

I've almost got it working, but I can't get the count to work properly.

I've changed the data so that it now looks like this:

List
1
1
1
Cut
List
1
1
Cut

and so on. So really, I just need to count the number of 1's between each set of List and Cut.

Here's the important parts of what I've got so far:

int mycount;
  ifstream file("log5.txt");
  string line;
    while (getline(file, line)){
      if (line == "List"){
        mycount = int count("List","Cut","1");
        cout << count << "\n"; //for testing
      }
      if (line == "Cut")
        line++;
     }

What am I doing wrong here? I'm getting an error message that count is not defined in the current scope.

Thanks again.

[LB]

mycount = int count("List","Cut","1");

What is this supposed to be? I can't tell if you're declaring a function or calling one.

[question3099]

Thanks L B,

I need to declare it first, and then print out its values with the cout in the next line. Here is my code after a few small changes:

 ifstream file("log5.txt");
  string line;
    while (getline(file, line)){
      if (line == "List"){
        int mycount = count("List","Cut","1");
        cout << mycount << "\n"; //for testing
      }
      if (line == "Cut")
        line++;
     }

But alas, it still returns Error: Function count("List","Cut","1") is not defined in current scope.

[LB]

Have you defined the function count()? What did you expect to happen? You're trying to call a function that doesn't exist, so of course it's not defined in this scope.

[question3099]

Further up in the code - in a part I didn't copy over - I also have:

#include <algorithm>
  using namespace::std;

Isn't count() defined in algorithm?

[LB]

http://www.cplusplus.com/reference/algorithm/count/ Yes, but you're using it wrong.

using namespace::std; this is clearly wrong. It should be using namespace std; without the scope resolution operator.

[question3099]

Thanks for the help LB,

After a bit more searching around on my own I found this beautiful solution on the internet and it worked perfectly after I trimmed my log5.txt file a bit more:
awk ' /List/ { if ( f!="") {print f-1}; f=0;f1=1 } f1 { f++ } ' log5.txt > newlog5.txt

Adapted from: http://www.unix.com/shell-programming-scripting/128999-counting-lines-between-two-patterns.html