by: Evan |
last post by:
Is there any standard for when to use #if
!defined(SOME_INCLUSION_GUARD) versus #ifndef SOME_INCLUSION_GUARD?
Aside from being able to combine multiple things into an #if, is there
any...
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by: prettysmurfed |
last post by:
Hi all
I have this, probably stupid question, how to avoid multiple
definitions when a header file is included more than once.
I thought, when you wrote the header-file and used the...
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by: DrUg13 |
last post by:
#ifndef HEADER_H
#define HEADER_H
blah blal
#endif
So this tells the compiler That if its defined do not define it again.
Could someone help me understand this.
Does this mean that if I...
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by: Michael Sgier |
last post by:
Hello
I get the error below. But why and what does ifndef? Well what
is ifndef?
Many thanks and regards
Michael
error: syntax error before `(' token
#ifndef MD2SwapInt
static __inline__...
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by: John Hanley |
last post by:
I have a program where both my main.c and program.c files use the program.h
file. So I #include "program.h" in both the .c files. The program.h file
has
#ifndef PROGRAM_H
#define PROGRAM_H...
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by: Qiao Jian |
last post by:
I am new to c. Today I just read an h file within which there is statements:
#ifndef _RANDOM_H
#define _RANDOM_H
So what is the meaning or purpose of this statement?
When should I use such...
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by: vfunc |
last post by:
Despite a #ifndef I am getting a redefinition error
The offending .h file looks like the following
#ifndef DISTRIB_H
#define DISTRIB_H
double dblpi; // this is getting compiled twice
...
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by: canoewhiteh2o |
last post by:
I am converting a couple of C header files to C#. It is mainly just a
bunch C structs but I am not sure how to handle the #ifdef and #ifndef
in C#. For example:
#ifndef DATE_TIME
#define...
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by: Johs |
last post by:
Each time I make a new .h file in eclipse it starts with this:
#ifndef FUNCS_H_
#define FUNCS_H_
// here goes all the code
#endif /*FUNCS_H_*/
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by: Studlyami |
last post by:
Okay I have been wondering this for a while now. I am a little confused on the difference between these two defines #pragma once & #ifndef.
From my understanding #pragma is compiler...
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by: Faith0G |
last post by:
I am starting a new it consulting business and it's been a while since I setup a new website. Is wordpress still the best web based software for hosting a 5 page website? The webpages will be...
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by: ryjfgjl |
last post by:
In our work, we often need to import Excel data into databases (such as MySQL, SQL Server, Oracle) for data analysis and processing. Usually, we use database tools like Navicat or the Excel import...
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by: aa123db |
last post by:
Variable and constants
Use var or let for variables and const fror constants.
Var foo ='bar';
Let foo ='bar';const baz ='bar';
Functions
function $name$ ($parameters$) {
}
...
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by: ryjfgjl |
last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
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by: ryjfgjl |
last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
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by: emmanuelkatto |
last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud.
Please let me know.
Thanks!
Emmanuel
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by: BarryA |
last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
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by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
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by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
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