Why no header file is OK for implementation?

Login or Register to Ask a Question and Join Our Community

Why no header file is OK for implementation?

Tags

c++, compile, header file, implementaion, programming

Top Forums Programming Why no header file is OK for implementation?

Prev Next

07-11-2017

Registered User

564, 13

Join Date: Sep 2009

Last Activity: 26 May 2021, 8:59 AM EDT

Location: Saskatchewan, Canada

Posts: 564

Thanks Given: 376

Thanked 13 Times in 12 Posts

Why no header file is OK for implementation?

A very basic thing but quite strange to me.
There is not corresponding header file (fastq.h) for the implementation fastq.cpp which has the line: #include "fastq.h", in a package source code, but at compiling of the whole pkg I did not get any error.
There is no #indef/#endif condition. Checked the compiling process, the fastq.h was never created from the intermediate steps, or by cmake/configure or any other process.
I am quite confused whether a header file (fastq.h) is not needed for the implementation fastq.cpp, as normally the header file is must for the corresponding implementation.
Then my next question is, under which circumstance the header file is not needed?

Thanks!

yifangt

View Public Profile for yifangt

Find all posts by yifangt

Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Find header in a text file and prepend it to all lines until another header is found

I've been struggling with this one for quite a while and cannot seem to find a solution for this find/replace scenario. Perhaps I'm getting rusty. I have a file that contains a number of metrics (exactly 3 fields per line) from a few appliances that are collected in parallel. To identify the...

2. Shell Programming and Scripting

Manipulate all rows except header, but header should be output as well

Hello There... I have a sample input file .. number:department:amount 125:Market:125.23 126:Hardware store:434.95 127:Video store:7.45 128:Book store:14.32 129:Gasolline:16.10 I will be doing some manipulations on all the records except the header, but the header should always be...

3. Shell Programming and Scripting

Add column header and row header

Hi, I have an input like this 1 2 3 4 2 3 4 5 4 5 6 7 I would like to count the no. of columns and print a header with a prefix "Col". I would also like to count the no. of rows and print as first column with each line number with a prefix "Row" So, my output would be ...

4. UNIX for Dummies Questions & Answers

Merge all csv files in one folder considering only 1 header row and ignoring header of all others

Friends, I need help with the following in UNIX. Merge all csv files in one folder considering only 1 header row and ignoring header of all other files. FYI - All files are in same format and contains same headers. Thank you

5. Shell Programming and Scripting

Comparing one file header with another file header

Hi Experts, In our project we have requirement where in we have to compare header of one file with header in the parameter file. There are 20 files which we ftp from one site. All this files have different header. We are comapring this file with our parameter file(which is having the header...

6. Shell Programming and Scripting

Renaming all header to specific header pattern

Input #HAC0253 EFVHIJHIJEFVTHIJOPKOPKTEFVEFVEFVOPKHIJOPKOPKHIJTTEFVEFVTEFV #BASFS12 EFVEFVHIJEFVEFVTOPKEFVOPKTHIJTTHIJOPK #ACG5115 TEFVEFVOIJEFVHIJHIJOPKOPKHIJHIJTTEFVEFVOPKTTEFVEFVOPKHIJOPKOPKOPK #ECG5114 IJTOPKHIJEFVOEFVEFVOPKTTEFVEFVOPKHIJOPKOPKOPK . . Output

7. Shell Programming and Scripting

Split large file and add header and footer to each file

I have one large file, after every 200 line i have to split the file and the add header and footer to each small file? It is possible to add different header and footer to each file?

8. Linux

Reading the header of a tar file(posix header)

say i have these many file in a directory named exam. 1)/exam/newfolder/link.txt. 2)/exam/newfolder1/ and i create a tar say exam.tar well the problem is, when i read the tar file i dont find any metadata about the directories,as you cannot create a tar containig empty directories. on the...

9. UNIX for Advanced & Expert Users

Horizontal sorting of lines in a File: SED implementation?

Hi guys, Do you know how can I sort a file horizontally per line??? sample input file: zebra papa dog apple yahoo kangaroo ape sample output: apple dog papa zebra ape kangaroo yahoo Please post if u know the sed implementation of this (or whatever implementation u may know of)...

Login or Register to Ask a Question

LEARN ABOUT DEBIAN

lastal

LASTAL(1)							   User Commands							 LASTAL(1)

NAME

       lastal - genome-scale comparison of biological sequences

SYNOPSIS

       lastal [options] lastdb-name fasta-sequence-file(s)

DESCRIPTION

       Find local sequence alignments.

       Score  options  (default  settings): -r: match score   (DNA: 1, protein: blosum62, 0<Q<5:  6) -q: mismatch cost (DNA: 1, protein: blosum62,
       0<Q<5: 18) -p: file for residue pair scores -a: gap existence cost (DNA: 7, protein: 11, 0<Q<5: 21) -b: gap extension cost  (DNA:  1,  pro-
       tein:   2,  0<Q<5:   9)	-c:  unaligned	residue  pair cost (100000) -F: frameshift cost (off) -x: maximum score drop for gapped alignments
       (max[y, a+b*20]) -y: maximum score drop for gapless alignments (t*10) -z: maximum score drop for final gapped alignments  (x)  -d:  minimum
       score for gapless alignments (e*3/5) -e: minimum score for gapped alignments (DNA: 40, protein: 100, 0<Q<5: 180)

       Cosmetic  options  (default  settings): -h: show all options and their default settings -v: be verbose: write messages about what lastal is
       doing -o: output file -f: output format: 0=tabular, 1=maf (1)

       Miscellaneous options (default settings): -s: strand: 0=reverse, 1=forward, 2=both (2 for DNA, 1 for protein) -m: maximum multiplicity  for
       initial	matches (10) -l: minimum length for initial matches (1) -n: maximum number of gapless alignments per query position (infinity) -k:
       step-size along the query sequence (1) -i: query batch size (1 MiB if Q>0, else 16 MiB if j=0, else 128	MiB)  -u:  mask  lowercase  during
       extensions: 0=never, 1=gapless,

	      2=gapless+gapped but not final, 3=always (2 if lastdb -c and Q<5, else 0)

       -w:  supress  repeats  inside exact matches, offset by this distance or less (1000) -G: genetic code file -t: 'temperature' for calculating
       probabilities (1/lambda) -g: 'gamma' parameter for gamma-centroid and LAMA (1) -j: output  type:  0=match  counts,  1=gapless,  2=redundant
       gapped, 3=gapped,

	      4=column ambiguity estimates, 5=gamma-centroid, 6=LAMA (3)

       -Q: input format: 0=fasta, 1=fastq-sanger, 2=fastq-solexa, 3=fastq-illumina,

	      4=prb, 5=PSSM (0)

REPORTING BUGS

       Report bugs to: last (ATmark) cbrc (dot) jp
       LAST home page: http://last.cbrc.jp/

lastal 199							     May 2012								 LASTAL(1)