[SOLVED] sscanf does not work in INLINE code

[Eric.Erpelding]

I am trying to use sscanf inside a block of INLINE code.
But the GLBasic compiler gives this error:

error: `sscanf' was not declared in this scope

The same "not declared in this scope" error occurs if I try to call the printf fuction as well.
Can one use these functions in INLINE code?

[dreamerman]

Any code to begin with? C++ inline gives freedom to use any c lib/function but requires more knowledge about C. If you don't need it, use internal GLB commands.
First include 'stdio' lib as in any C app:

Code: (glbasic) [Select]

INLINE
        }
                extern "C" {
                        #include <cstdio>
                }
        namespace __GLBASIC__ {
ENDINLINE
Then you may use functions from that lib in that source file:

Code: (glbasic) [Select]

LOCAL sentence$ = "Rudolph is 12 years old"
INLINE
char str [20];
  int i;

sscanf (sentence_Str,"%s %*s %d",str,&i);
printf ("%s -> %d\n",str,i);
ENDINLINEThis is example from cplusplus.com
Note that it's using printf (stdout) so result wont be visible in debug window, either use other editor or command line:

Code: (glbasic) [Select]

c:\project\test\your_app.exe >> out.txt

[Eric.Erpelding]

Thank you dreamerman.
I am still having problems making a GLBasic console program that will convert a Hex string into a Decimal value.
Here is my code:

Code: (glbasic) [Select]

// --------------------------------- //
// Project: INLINE Test
// Start: Friday, August 12, 2016
// IDE Version: 14.001
//
// Note:
// Check "Project->Options->Console" to make console exe

GLOBAL value%
GLOBAL A$
STDOUT "***INLINE Test***\n"
value=0

STDOUT "Enter Hex Number > "
A$=STDIN$()

INLINE
}  // Close __GLBASIC__ namespace

extern "C" {
#include <cstdio>
sscanf(A_Str,"%x",&value);                     
}
             
namespace __GLBASIC__ {
ENDINLINE

STDOUT "Decimal Value = "+value

// wait for user input to exit
A$=STDIN$()

I am getting these kinds of errors when compiling:

error: expected constructor, destructor, or type conversion before '(' token
error: expected constructor, destructor, or type conversion before '=' token
error: expected unqualified-id before "return"

[dreamerman]

Hm... probably you need to put Inline part out of main source code, don't remember why atm, but in separate file it works ok:
main file:

Code: (glbasic) [Select]

// Note:
// Check "Project->Options->Console" to make console exe



GLOBAL value%
GLOBAL A$
STDOUT "***INLINE Test***\n"
value=0

STDOUT "Enter Hex Number > "
A$=STDIN$()

scan_key()

STDOUT "Decimal Value = " + (value)

// wait for user input to exit
A$=STDIN$()second file:

Code: (glbasic) [Select]

INLINE
        }
                extern "C" {
                        #include <cstdio>
                }
        namespace __GLBASIC__ {
ENDINLINE

FUNCTION scan_key%:
INLINE
sscanf(A_Str,"%x",&value);
ENDINLINE
ENDFUNCTIONAnother thing that to use GLB variables you need to be in GLB scope/namespace when in Inline.

[Eric.Erpelding]

There seems to be a problem when closing and then opening the __GLBASIC__ namespace in the main program.
This code will not compile.

Code: (glbasic) [Select]

// --------------------------------- //
// Project: INLINE
// Start: Friday, August 12, 2016
// IDE Version: 14.001

STDOUT "***INLINE Test***\n"

INLINE
}
namespace __GLBASIC__ {
ENDINLINE

END
The errors reported are:

error: expected constructor, destructor, OR TYPE conversion before ';' token
error: expected unqualified-id before "return"

Code is being compiled on a Windows 7 SP3 64-bit computer.

[Eric.Erpelding]

I was looking at the generated code for my INLINE test program that does not compile.
It seems that the first '}' in the INLINE code will match up with the starting '{' of the main program code block,

int __MainGameSub_(void)
{

After the first '}' in the INLINE code there is no more main program code to continue with!
So it looks like one cannot close the __GLBASIC__ namespace in the main program.
What can one do?

[dreamerman]

Just put that inline to second file and add it to your project, like in my previous post. ;]
Don't remember if you can somehow bypass that and have include in main source...

[Eric.Erpelding]

Just put that inline to second file and add it to your project, like in my previous post. ;]

Yes, that is the solution. Thank you again dreamerman.
I named the second file "INLINE2.gbas" and added it to the project.
It works, and then I tried removing the closing and opening of the __GLBASIC__ namespace as is shown in this code:

Code: (glbasic) [Select]

// --------------------------------- //
// Project: Inline
// File:    Inline2.gbas
// Start: Friday, August 12, 2016
// IDE Version: 14.001


// SETCURRENTDIR("Media") // go to media files
?IF 1
INLINE
//        }
                extern "C" {
                        #include <cstdio>
                }
//        namespace __GLBASIC__ {
ENDINLINE
?ENDIF

FUNCTION scan_key%:
        INLINE
                sscanf(A_Str,"%x",&value);
        ENDINLINE
ENDFUNCTION
And the code still worked!

What are the rules for when one should close and then re-open a namespace in INLINE code?