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Colleen
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 Posted: Mon Apr 19, 2004 5:26 pm Post subject: how do I make variables global?? |
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Maybe anyone can help me to do this, or just tell me it's not
possible...
I have data that I read from a file in my 'int main()'. Now I want to
make calculations using these data in several procedures. Since
writing the code for calling all the various data one by one in each
procedure is tedious and messy, I would like to find a way how to make
the data global instead, so that all the procedures know the data.Is
that possible?
Thanks for help.
Greetings,
W.
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Daniel Albuschat
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| Posted: Tue Apr 20, 2004 5:12 am Post subject: Re: how do I make variables global?? |
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Colleen wrote:
| Quote: | I have data that I read from a file in my 'int main()'. Now I want to
make calculations using these data in several procedures. Since
writing the code for calling all the various data one by one in each
procedure is tedious and messy, I would like to find a way how to make
the data global instead, so that all the procedures know the data.Is
that possible?
|
Let's assume your data is of type `Data' and this type is declared
in data.h. Then you would do something like this:
in main.cpp:
#include "utils.h"
#include "data.h"
void read_data( Data &data ) {
/* ... */
}
int main() {
Data data;
read_data(data);
}
in utils.h:
#include "data.h"
void do_calculations( Data &data );
in utils.cpp:
#include "utils.h"
void do_calculations( Data &data ) {
/* do some calculations on the precious data */
}
cu,
Daniel Albuschat
P.S.: This is a german newsgroup.
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Marco Budde
Guest
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| Posted: Wed Apr 28, 2004 4:12 pm Post subject: Re: how do I make variables global?? |
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Colleen wrote:
Why are you posting to a German group in English  ?
| Quote: | I have data that I read from a file in my 'int main()'. Now I want to
make calculations using these data in several procedures. Since
writing the code for calling all the various data one by one in each
procedure is tedious and messy,
|
Read a book about OOP and/or use structs and classes.
| Quote: | I would like to find a way how to make
the data global instead,
|
Never made any data global. This makes programs nearly
unreadable.
| Quote: | so that all the procedures know the data.Is
that possible?
|
Learn a new language feature called "class"?
cu, Marco
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S: Minolta: Winkelsucher (VN), VC-9
E-Mail: mb-news-b<ät>linuxhaven.de
Deutsches Linux HOWTO Projekt: http://www.linuxhaven.de
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