find the number of blank lines in a file

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Hi,

I need to find the number of blank lines from a particular directory in all the files that ends with '.h' extension.

Thanks in advance

OP's additional information copied from comment below
First displayed all the .h files using the command ls /usr/include/ | grep '.h$'.

Now, I dont know how to proceed to open all those .h files and how to find blank lines.

I have tried grep -n ^$ filename | wc -l, to find the number of blank lines for a particular file.

But I need to know how to make both commands to work together. Please help.

Posted 17-Nov-12 20:23pm

srmohanr

Updated 19-Nov-12 4:39am

Pablo Aliskevicius

v3

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Comments

Richard MacCutchan 18-Nov-12 4:39am

And what difficulty are you having in solving this problem?

Nelek 18-Nov-12 8:13am

Please don't think we can read minds or do astral projections to see your monitor. If you need help, the least you could do is to add some relevant code to your question or to explain your problem in such a way, that the users of CP can understand it. Otherwise, nobody will be able to help you.
what have you tried?[^]

srmohanr 19-Nov-12 1:02am

First dislayed all the .h files using the command ls /usr/include/ | grep '.h$'.

Now, I dont know how to proeceed to open all those .h files and how to find blank lines.

I have tried grep -n ^$ filename | wc -l, to find the number of blank lines for a particular file.

But I need to know how to make both commands to work together. Please help.

Sergey Alexandrovich Kryukov 19-Nov-12 11:58am

C? C++? Tag it.
--SA

Sergey Alexandrovich Kryukov 19-Nov-12 12:00pm

What have you so far? Such a trivial problem, but if you have some difficulties -- it's quite natural for beginners. Try to solve it by yourself and show your code. Explain what did you try, what happens, why do your thing it's wrong...
--SA

srmohanr 19-Nov-12 23:19pm

I have tried to find the no. of blabk lines from all the .h files in a particular directory by using the command cat ../../usr/include/* | grep '^.h$'| grep ![a-z] | grep ![A-Z] | grep ![0-9] | grep ![`~!@#$%^&*()+=<>?:"{}|,./;'[]\] | wc -l

Richard MacCutchan 19-Nov-12 14:24pm

wc -l counts total lines, not blank lines. You need to write a program to do this.

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