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Old 03-10-2003, 10:55 AM   #1
TexasDex
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Compiling C++ in Linux


This application which I am trying to port to Linux was written and works fine in the Windows 95 version of DJGPP/RHIDE. I want to compile it to Linux but I can't even get a simple program to compile properly.

I used the command gcc mytest.cpp and got error messages that the function cin was not recognized.

I tried using gcc -x c++ mytest.cpp
and got error messages that the include file was deprecated.

I tried using #include <iostream> instead of iostream.h
I get confusing error messages.

Could somebody point me in the right direction?
 
Old 03-10-2003, 11:13 AM   #2
acid_kewpie
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there were a number of confused people on here asking about all that. it's proably down to the ISO C standards being interpreted differently by different developers... you will need to either export the standard namespace ( using namespace std; ) or clairfy the fill namespace with std::cin wherever just cin is currently used.
 
Old 03-10-2003, 11:15 AM   #3
star geezer
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Try running g++ instead of gcc & see what happens...
 
Old 03-10-2003, 02:01 PM   #4
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Basically it comes down to which compiler lags
behind the standards how far ... I believe it's a
fair bet to assume that the DOS port by Jim is
behind, since he bases on the GNU gcc suite.

If you want best compliance with C++ standards
get & use the STLPort :)

Cheers,
Tink
 
Old 03-10-2003, 02:52 PM   #5
Schizo265
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g++
 
Old 03-10-2003, 03:02 PM   #6
acid_kewpie
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we have already established that g++ is not the solution, and someone had already stated that solution....
 
Old 03-10-2003, 03:09 PM   #7
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oh. Sorry for not reading through.
Why isn't g++ the solution though?
from my personal experience, gcc doesn't work and I get iostream errors, but g++ compiles perfectly.
 
Old 03-10-2003, 04:10 PM   #8
TexasDex
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This will sound kinda stupid but how do I run the program after I compile it?

I got it to compile with the gcc and g++ commands, by including the iostream.h header (even though it gave me a warning that it was deprecated) and after it had compiled the file a.out appeared in the directory. Now what do I do? Do I have to link it somehow? Sorry, but I'm used to having a development environment, not this kind of (non)interface.
 
Old 03-10-2003, 04:18 PM   #9
Tinkster
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Nope, just run it :)

./a.out

If you don't like the executables name
use the
-o <your filename>
option...

Cheers,
Tink

Last edited by Tinkster; 03-10-2003 at 04:19 PM.
 
Old 03-11-2003, 12:12 AM   #10
Fingel
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int main();
using namespace std;

thats the soulution to all your problems, I had the same thing.
 
Old 03-19-2003, 10:22 AM   #11
TexasDex
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I don't know what that little bit of code does, but it works. It lets me use the updated header so I don't get a warning message.

And as for running the app, I forgot that Linux doesn't let you type in a command right from the directory it is in. I tried the ./a.out (later I tried the filename ./practice because that's what I renamed it) and it worked fine.

Thanks to all! It works!
 
Old 03-19-2003, 07:04 PM   #12
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Standard C++ now uses a namespace called std.
 
Old 04-03-2003, 04:14 PM   #13
TexasDex
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I just realized that the first person who responded answered the question, I just didn't understand what acid_kewpie meant. Fingel clarified how to get it to work even though he might not have understood exactly what the code does (like me). Almost ironic, that those who can often best help newbies are newbies themselves.
 
Old 04-03-2003, 04:19 PM   #14
acid_kewpie
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hell yeah. also helps if you can spell, which i can't....
 
Old 04-03-2003, 04:48 PM   #15
nakkaya
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begin your program like this if you are using new type headers
#include <iostream>
using namespace std;
more info on name spaces
http://faq.cprogramming.com/cgi-bin/...&id=1043284351

and check that if you have any un standart include file for windows.
 
  


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